These AP Biology outlines correspond to Campbell's Biology, 7th Edition. These outlines, along with the AP Biology Slides, will help you prepare for the AP Biology Exam.
Additional Information:
Chapter 1 Exploring Life
Lecture Outline
Overview: Biology’s Most Exciting Era
Concept 1.1 Biologists explore life from the microscopic to the global scale
Organisms interact continuously with their environment.
Cells are an organism’s basic unit of structure and function.
Concept 1.2 Biological systems are much more than the sum of their parts
Regulatory mechanisms ensure a dynamic balance in living systems.
Concept 1.3 Biologists explore life across its great diversity of species
Living things show diversity and unity.
Concept 1.4 Evolution accounts for life’s unity and diversity
Concept 1.5 Biologists use various forms of inquiry to explore life
We can explore the scientific method.
Let’s look at the nature of science.
Science and technology are functions of society.
Concept 1.6 A set of themes connects the concepts of biology
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Chapter 2 The Chemical Context of Life
Lecture Outline
Overview: Chemical Foundations of Biology
Concept 2.1 Matter consists of chemical elements in pure form and in combinations called compounds
25 chemical elements are essential to life.
Concept 2.2 An element’s properties depend on the structure of its atoms
Electron configuration influences the chemical behavior of an atom.
Concept 2.3 The formation and function of molecules depend on chemical bonding between atoms
Weak chemical bonds play important roles in the chemistry of life.
A molecule’s biological function is related to its shape.
Concept 2.4 Chemical reactions make and break chemical bonds
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Chapter 3 Water and the Fitness of the Environment
Lecture Outline
Overview: The Molecule That Supports All of Life
Concept 3.1 The polarity of water molecules results in hydrogen bonding
Concept 3.2 Four emergent properties of water contribute to Earth’s fitness for life
Organisms depend on the cohesion of water molecules.
Water moderates temperatures on Earth.
Oceans and lakes don’t freeze solid because ice floats.
Water is the solvent of life.
Concept 3.3 Dissociation of water molecules leads to acidic and basic conditions that affect living organisms
Organisms are sensitive to changes in pH.
Acid precipitation threatens the fitness of the environment.
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Chapter 4 Carbon and the Molecular Diversity of Life
Lecture Outline
Overview: Carbon – The Backbone of Biological Molecules
Concept 4.1 Organic chemistry is the study of carbon compounds
Concept 4.2 Carbon atoms can form diverse molecules by bonding to four other atoms
Variation in carbon skeletons contributes to the diversity of organic molecules.
Concept 4.3 Functional groups are the parts of molecules involved in chemical reactions
These are the chemical elements of life.
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Chapter 5 The Structure and Function of Macromolecules
Lecture Outline
Overview: The Molecules of Life
Concept 5.1 Most macromolecules are polymers, built from monomers
An immense variety of polymers can be built from a small set of monomers.
Concept 5.2 Carbohydrates serve as fuel and building material
Sugars, the smallest carbohydrates, serve as fuel and a source of carbon.
Polysaccharides, the polymers of sugars, have storage and structural roles.
Concept 5.3 Lipids are a diverse group of hydrophobic molecules
Fats store large amounts of energy.
Phospholipids are major components of cell membranes.
Steroids include cholesterol and certain hormones.
Concept 5.4 Proteins have many structures, resulting in a wide range of functions
Amino acids are the monomers from which proteins are constructed.
The amino acid sequence of a polypeptide can be determined.
Protein conformation determines protein function.
Concept 5.5 Nucleic acids store and transmit hereditary information
There are two types of nucleic acids: RNA and DNA.
A nucleic acid strand is a polymer of nucleotides.
Inheritance is based on replication of the DNA double helix.
We can use DNA and proteins as tape measures of evolution.
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Chapter 6 A Tour of the Cell
Lecture Outline
Overview: The Importance of Cells
Concept 6.1 To study cells, biologists use microscopes and the tools of biochemistry
Cell biologists can isolate organelles to study their functions.
Concept 6.2 Eukaryotic cells have internal membranes that compartmentalize their functions
Prokaryotic and eukaryotic cells differ in size and complexity.
Internal membranes compartmentalize the functions of a eukaryotic cell.
Concept 6.3 The eukaryotic cell’s genetic instructions are housed in the nucleus and carried out by the ribosomes
Ribosomes build a cell’s proteins.
Concept 6.4 The endomembrane system regulates protein traffic and performs metabolic functions in the cell
The endoplasmic reticulum manufactures membranes and performs many other biosynthetic functions.
The Golgi apparatus is the shipping and receiving center for cell products.
Lysosomes are digestive compartments.
Vacuoles have diverse functions in cell maintenance.
Concept 6.5 Mitochondria and chloroplasts change energy from one form to another
Peroxisomes generate and degrade H2O2 in performing various metabolic functions.
Concept 6.6 The cytoskeleton is a network of fibers that organizes structures and activities in the cell
The cytoskeleton provides support, motility, and regulation.
Concept 6.7 Extracellular components and connections between cells help coordinate cellular activities
Plant cells are encased by cell walls.
The extracellular matrix (ECM) of animal cells functions in support, adhesion, movement, and regulation.
Intercellular junctions help integrate cells into higher levels of structure and function.
A cell is a living unit greater than the sum of its parts.
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Chapter 7 Membrane Structure and Function
Lecture Outline
Overview: Life at the Edge
Concept 7.1 Cellular membranes are fluid mosaics of lipids and proteins
Membrane models have evolved to fit new data.
Membranes are fluid.
Membranes are mosaics of structure and function.
Membrane carbohydrates are important for cell-cell recognition.
Membranes have distinctive inside and outside faces.
Concept 7.2 Membrane structure results in selective permeability
Concept 7.3 Passive transport is diffusion of a substance across a membrane with no energy investment
Osmosis is the passive transport of water.
Cell survival depends on balancing water uptake and loss.
Specific proteins facilitate passive transport of water and selected solutes.
Concept 7.4 Active transport uses energy to move solutes against their gradients
Some ion pumps generate voltage across membranes.
In cotransport, a membrane protein couples the transport of two solutes.
Concept 7.5 Bulk transport across the plasma membrane occurs by exocytosis and endocytosis
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Chapter 8 An Introduction to Metabolism
Lecture Outline
Overview: The Energy of Life
Concept 8.1 An organism’s metabolism transforms matter and energy, subject to the laws of thermodynamics
The chemistry of life is organized into metabolic pathways.
Organisms transform energy.
The energy transformations of life are subject to two laws of thermodynamics.
Concept 8.2 The free-energy change of a reaction tells us whether the reaction occurs spontaneously
Concept 8.3 ATP powers cellular work by coupling exergonic reactions to endergonic reactions
Concept 8.4 Enzymes speed up metabolic reactions by lowering energy barriers
Enzymes are substrate specific.
The active site is an enzyme’s catalytic center.
A cell’s physical and chemical environment affects enzyme activity.
Concept 8.5 Regulation of enzyme activity helps control metabolism
Metabolic control often depends on allosteric regulation.
The localization of enzymes within a cell helps order metabolism.
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Chapter 9 Cellular Respiration: Harvesting Chemical Energy
Lecture Outline
Overview: Life Is Work
Concept 9.1 Catabolic pathways yield energy by oxidizing organic fuels
Redox reactions release energy when electrons move closer to electronegative atoms.
The “fall” of electrons during respiration is stepwise, via NAD+ and an electron transport chain.
These are the stages of cellular respiration: a preview.
Concept 9.2 Glycolysis harvests chemical energy by oxidizing glucose to pyruvate
Concept 9.3 The citric acid cycle completes the energy-yielding oxidation of organic molecules
Concept 9.4 During oxidative phosphorylation, chemiosmosis couples electron transport to ATP synthesis
The inner mitochondrial membrane couples electron transport to ATP synthesis.
Here is an accounting of ATP production by cellular respiration.
Concept 9.5 Fermentation enables some cells to produce ATP without the use of oxygen
Concept 9.6 Glycolysis and the citric acid cycle connect to many other metabolic pathways
Feedback mechanisms control cellular respiration.
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Chapter 33 Invertebrates
Lecture Outline
Overview: Life Without a Backbone
Concept 33.1 Sponges are sessile and have a porous body and choanocytes
Concept 33.2 Cnidarians have radial symmetry, a gastrovascular cavity, and cnidocytes
Concept 33.3 Most animals have bilateral symmetry
Phylum Platyhelminthes: Flatworms are acoelomates with gastrovascular cavities.
Phylum Rotifera: Rotifers are pseudocoelomates with jaws, crowns of cilia, and complete digestive tracts.
The lophophorate phyla: ectoprocts, phoronids, and brachiopods are coelomates with ciliated tentacles around their mouths.
Phylum Nemertea: Proboscis worms are named for their prey-capturing apparatus.
Concept 33.4 Molluscs have a muscular foot, a visceral mass, and a mantle
Concept 33.5 Annelids are segmented worms
Concept 33.6 Nematodes are nonsegmented pseudocoelomates covered by a tough cuticle
Concept 33.7 Arthropods are segmented coelomates that have an exoskeleton and jointed appendages
Concept 33.8 Echinoderms and chordates are deuterostomes
Phylum Echinodermata: Echinoderms have a water vascular system and secondary radial symmetry.
Phylum Chordata: The chordates include two invertebrate subphyla and all vertebrates.
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Chapter 34 Vertebrates
Lecture Outline
Overview: Half a Billion Years of Backbones
Concept 34.1 Chordates have a notochord and a dorsal, hollow nerve cord
Four derived characters define the phylum Chordata.
Invertebrate chordates provide clues to the origin of vertebrates.
Concept 34.2 Craniates are chordates that have a head
Living craniates have a set of derived characters.
Cambrian fossils provide clues to craniate origins.
Class Myxini: Hagfishes are the least derived craniate lineage.
Concept 34.3 Vertebrates are craniates that have a backbone
Class Cephalaspidomorphi: Lampreys are the oldest living lineage of vertebrates.
Many vertebrate lineages emerged early.
Concept 34.4 Gnathostomes are vertebrates that have jaws
Gnathostomes have a number of shared, derived characters.
Class Chondrichthyes: Sharks and rays have cartilaginous skeletons.
Osteichthyes: The extant classes of bony fishes are the ray-finned fishes, the lobe-finned fishes, and the lungfishes.
Concept 34.5 Tetrapods are gnathostomes that have limbs and feet
Class Amphibia: Salamanders, frogs, and caecilians are the three extant amphibian orders.
Concept 34.6 Amniotes are tetrapods that have a terrestrially adapted egg
The reptile clade includes birds.
Birds evolved as feathered dinosaurs.
Concept 34.7 Mammals are amniotes that have hair and produce milk
Mammals diversified extensively in the wake of the Cretaceous extinctions.
Concept 34.8 Humans are bipedal hominoids with a large brain
Primate evolution provides a context for understanding human origins.
Humans are bipedal hominoids.
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Chapter 35 Plant Structure, Growth, and Development
Lecture Outline
Overview: No Two Plants Are Alike
Concept 35.1 The plant body has a hierarchy of organs, tissues, and cells
Vascular plants have three basic organs: roots, stems, and leaves.
Plant organs are composed of three tissue systems: dermal, vascular, and ground.
Plant tissues are composed of three basic cell types: parenchyma, collenchyma, and sclerenchyma.
Concept 35.2 Meristems generate cells for new organs
Concept 35.3 Primary growth lengthens roots and shoots
Concept 35.4 Secondary growth adds girth to stems and roots in woody plants
Concept 35.5 Growth, morphogenesis, and differentiation produce the plant body
Molecular biology is revolutionizing the study of plants.
Growth involves both cell division and cell expansion.
Morphogenesis depends on pattern formation.
Cellular differentiation depends on the control of gene expression.
Clonal analysis of the shoot apex emphasizes the importance of a cell’s location in its developmental fate.
Phase changes mark major shifts in development.
Genes controlling transcription play key roles in a meristem’s change from a vegetative to a floral phase.
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Chapter 10 Photosynthesis
Lecture Outline
Overview: The Process That Feeds the Biosphere
Plants and other autotrophs are the producers of the biosphere.
Concept 10.1 Photosynthesis converts light energy to the chemical energy of food
Evidence that chloroplasts split water molecules enabled researchers to track atoms through photosynthesis.
Here is a preview of the two stages of photosynthesis.
Concept 10.2 The light reactions convert solar energy to the chemical energy of ATP and NADPH
Concept 10.3 The Calvin cycle uses ATP and NADPH to convert CO2 to sugar
Phase 1: Carbon fixation
Phase 2: Reduction
Phase 3: Regeneration
Concept 10.4 Alternative mechanisms of carbon fixation have evolved in hot, arid climates
Here is a review of the importance of photosynthesis.
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Chapter 11 Cell Communication
Lecture Outline
Overview: The Cellular Internet
Concept 11.1 External signals are converted into responses within the cell
Cell signaling evolved early in the history of life.
Communicating cells may be close together or far apart.
The three stages of cell signaling are reception, transduction, and response.
Concept 11.2 Reception: A signal molecule binds to a receptor protein, causing it to change shape
Some receptor proteins are intracellular.
Most signal receptors are plasma membrane proteins.
Concept 11.3 Transduction: Cascades of molecular interactions relay signals from receptors to target molecules in the cell
Pathways relay signals from receptors to cellular responses.
Protein phosphorylation, a common mode of regulation in cells, is a major mechanism of signal transduction.
Certain signal molecules and ions are key components of signaling pathways (second messengers).
Concept 11.4 Response: Cell signaling leads to regulation of cytoplasmic activities or transcription
Elaborate pathways amplify and specify the cell’s response to signals.
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Chapter 12 The Cell Cycle
Lecture Outline
Overview: The Key Roles of Cell Division
Cell division functions in reproduction, growth, and repair.
Concept 12.1 Cell division results in genetically identical daughter cells
Concept 12.2 The mitotic phase alternates with interphase in the cell cycle
The mitotic spindle distributes chromosomes to daughter cells: a closer look.
Cytokinesis divides the cytoplasm: a closer look.
Mitosis in eukaryotes may have evolved from binary fission in bacteria.
Concept 12.3 The cell cycle is regulated by a molecular control system
Cytoplasmic signals drive the cell cycle.
Internal and external cues help regulate the cell cycle.
Cancer cells have escaped from cell cycle controls.
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Chapter 13 Meiosis and Sexual Life Cycles
Lecture Outline
Overview: Hereditary Similarity and Variation
Concept 13.1 Offspring acquire genes from parents by inheriting chromosomes
Like begets like, more or less: a comparison of asexual and sexual reproduction.
Concept 13.2 Fertilization and meiosis alternate in sexual life cycles
Human cells contain sets of chromosomes.
Let’s discuss the role of meiosis in the human life cycle.
Organisms display a variety of sexual life cycles.
Concept 13.3 Meiosis reduces the number of chromosome sets from diploid to haploid
Prophase I
Metaphase I
Anaphase I
Telophase I and cytokinesis
Meiosis II
There are key differences between mitosis and meiosis.
Concept 13.4 Genetic variation produced in sexual life cycles contributes to evolution
Sexual life cycles produce genetic variation among offspring.
Evolutionary adaptation depends on a population’s genetic variation.
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Chapter 14 Mendel and the Gene Idea
Lecture Outline
Overview: Drawing from the Deck of Genes
Concept 14.1 Mendel used the scientific approach to identify two laws of inheritance
By the law of segregation, the two alleles for a character are separated during the formation of gametes.
By the law of independent assortment, each pair of alleles segregates independently into gametes.
Concept 14.2 The laws of probability govern Mendelian inheritance
Mendel discovered the particulate behavior of genes: a review.
Concept 14.3 Inheritance patterns are often more complex than predicted by simple Mendelian genetics
Concept 14.4 Many human traits follow Mendelian patterns of inheritance
Pedigree analysis reveals Mendelian patterns in human inheritance.
Many human disorders follow Mendelian patterns of inheritance.
Technology is providing new tools for genetic testing and counseling.
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Chapter 15 The Chromosomal Basis of Inheritance
Lecture Outline
Overview: Locating Genes on Chromosomes
Concept 15.1 Mendelian inheritance has its physical basis in the behavior of chromosomes
Morgan traced a gene to a specific chromosome.
Concept 15.2 Linked genes tend to be inherited together because they are located near each other on the same chromosome
Independent assortment of chromosomes and crossing over produce genetic recombinants.
Geneticists can use recombination data to map a chromosome’s genetic loci.
Concept 15.3 Sex-linked genes exhibit unique patterns of inheritance
The chromosomal basis of sex varies with the organism.
Sex-linked genes have unique patterns of inheritance.
Concept 15.4 Alterations of chromosome number or structure cause some genetic disorders
Human disorders are due to chromosome alterations.
Concept 15.5 Some inheritance patterns are exceptions to the standard chromosome theory
The phenotypic effects of some mammalian genes depend on whether they are inherited from the mother or the father.
Extranuclear genes exhibit a non-Mendelian pattern of inheritance.
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Chapter 16 The Molecular Basis of Inheritance
Lecture Outline
Overview: Life’s Operating Instructions
Concept 16.1 DNA is the genetic material
The search for genetic material led to DNA.
Watson and Crick discovered the double helix by building models to conform to X-ray data.
Concept 16.2 Many proteins work together in DNA replication and repair
During DNA replication, base pairing enables existing DNA strands to serve as templates for new complementary strands.
A large team of enzymes and other proteins carries out DNA replication.
Enzymes proofread DNA during its replication and repair damage in existing DNA.
The ends of DNA molecules are replicated by a special mechanism.
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Chapter 17 From Gene to Protein
Lecture Outline
Overview: The Flow of Genetic Information
Concept 17.1 Genes specify proteins via transcription and translation
The study of metabolic defects provided evidence that genes specify proteins.
Transcription and translation are the two main processes linking gene to protein.
In the genetic code, nucleotide triplets specify amino acids.
The genetic code must have evolved very early in the history of life.
Concept 17.2 Transcription is the DNA-directed synthesis of RNA: a closer look
Concept 17.3 Eukaryotic cells modify RNA after transcription
Concept 17.4 Translation is the RNA-directed synthesis of a polypeptide: a closer look
Signal peptides target some eukaryotic polypeptides to specific destinations in the cell.
Concept 17.5 RNA plays multiple roles in the cell: a review
Concept 17.6 Comparing gene expression in prokaryotes and eukaryotes reveals key differences
Concept 17.7 Point mutations can affect protein structure and function
What is a gene? We revisit the question.
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Chapter 18 The Genetics of Viruses and Bacteria
Lecture Outline
Overview: Microbial Model Systems
Concept 18.1 A virus has a genome but can reproduce only within a host cell
Researchers discovered viruses by studying a plant disease.
A virus is a genome enclosed in a protective coat.
Viruses can reproduce only within a host cell.
Phages reproduce using lytic or lysogenic cycles.
Animal viruses are diverse in their modes of infection and replication.
Viruses may have evolved from other mobile genetic elements.
Concept 18.2 Viruses, viroids, and prions are formidable pathogens in animals and plants
New viral diseases are emerging.
Plant viruses are serious agricultural pests.
Viroids and prions are the simplest infectious agents.
Concept 18.3 Rapid reproduction, mutation, and genetic recombination contribute to the genetic diversity of bacteria
Genetic recombination produces new bacterial strains.
Concept 18.4 Individual bacteria respond to environmental change by regulating their gene expression
Lecture Outline for Campbell/Reece Biology, 7th Edition, © Pearson Education, Inc. 18-1
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Chapter 19 Eukaryotic Genomes
Lecture Outline
Overview: How Eukaryotic Genomes Work and Evolve
Concept 19.1 Chromatin structure is based on successive levels of DNA packing
Concept 19.2 Gene expression can be regulated at any stage, but the key step is transcription
Chromatin modifications affect the availability of genes for transcription.
Transcription initiation is controlled by proteins that interact with DNA and with each other.
Post-transcriptional mechanisms play supporting roles in the control of gene expression.
Concept 19.3 Cancer results from genetic changes that affect cell cycle control
Oncogene proteins and faulty tumor-suppressor proteins interfere with normal signaling pathways.
Multiple mutations underlie the development of cancer.
Concept 19.4 Eukaryotic genomes can have many noncoding DNA sequences in addition to genes
Gene families have evolved by duplication of ancestral genes.
Concept 19.5 Duplications, rearrangements, and mutations of DNA contribute to genome evolution
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Chapter 20 DNA Technology and Genomics
Lecture Outline
Overview: Understanding and Manipulating Genomes
Concept 20.1 DNA cloning permits production of multiple copies of a specific gene or other DNA segment
Restriction enzymes are used to make recombinant DNA.
Eukaryotic genes can be cloned in bacterial plasmids.
Cloned genes are stored in DNA libraries.
Eukaryote genes can be expressed in prokaryotic host cells.
The polymerase chain reaction (PCR) amplifies DNA in vitro.
Concept 20.2 Restriction fragment analysis detects DNA differences that affect restriction sites
Restriction fragment length differences are useful as genetic markers.
Concept 20.3 Entire genomes can be mapped at the DNA level
Concept 20.4 Genome sequences provide clues to important biological questions
Concept 20.5 The practical applications of DNA technology affect our lives in many ways
DNA technology is reshaping medicine and the pharmaceutical industry.
DNA technology offers forensic, environmental, and agricultural applications.
DNA technology raises important safety and ethical questions.
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Chapter 21 The Genetic Basis of Development
Lecture Outline
Overview: From Single Cell to Multicellular Organism
Concept 21.1 Embryonic development involves cell division, cell differentiation, and morphogenesis
Concept 21.2 Different cell types result from differential gene expression in cells with the same DNA
Different types of cells in an organism have the same DNA.
Different cell types make different proteins, usually as a result of transcriptional regulation.
Transcriptional regulation is directed by maternal molecules in the cytoplasm and signals from other cells.
Concept 21.3 Pattern formation in animals and plants results from similar genetic and cellular mechanisms
Drosophila development is controlled by a cascade of gene activations.
Gradients of maternal molecules in the early embryo control axis formation.
A cascade of gene activations sets up the segmentation pattern in Drosophila.
Homeotic genes direct the identity of body parts.
Neighboring cells instruct other cells to form particular structures: cell signaling and induction in the nematode.
Plant development depends on cell signaling and transcriptional regulation.
Concept 21.4 Comparative studies help explain how the evolution of development leads to morphological diversity
There are some basic similarities—and many differences—in the development of plants and animals.
Lecture Outline for Campbell/Reece Biology, 7th Edition, © Pearson Education, Inc. 21-1
Chapter 22 Descent with Modification: Darwinian View of Life
Lecture Outline
Overview: Darwin Introduces a Revolutionary Theory
Concept 22.1 The Darwinian revolution challenged traditional views of a young Earth inhabited by unchanging species
Western culture resisted evolutionary views of life.
Theories of geologic gradualism prepared the path for evolutionary biologists.
Lamarck placed fossils in an evolutionary context.
Concept 22.2 In The Origin of Species, Darwin proposed that species change through natural selection
Field research helped Darwin frame his view of life.
The Origin of Species developed two main ideas: that evolution explains life’s unity and diversity and that natural selection is the mechanism of adaptive evolution.
Concept 22.3 Darwin’s theory explains a wide range of observations
Evidence of evolution pervades biology.
What is theoretical about the Darwinian view of life?
Lecture Outline for Campbell/Reece Biology, 7th Edition, © Pearson Education, Inc. 22-1
Chapter 23 The Evolution of Populations
Lecture Outline
Overview: The Smallest Unit of Evolution
Concept 23.1 Population genetics provides a foundation for studying evolution
The modern evolutionary synthesis integrated Darwinian selection and Mendelian inheritance.
A population’s gene pool is defined by its allele frequencies.
The Hardy-Weinberg Theorem describes a nonevolving population.
p2 + 2pq + q2 = 1.0
Five conditions must be met for a population to remain in Hardy-Weinberg equilibrium.
Concept 23.2 Mutation and sexual recombination produce the variation that makes evolution possible
New genes and new alleles originate only by mutation.
Sexual recombination also produces genetic variation.
Concept 23.3 Natural selection, genetic drift, and gene flow can alter a population’s genetic composition
Natural selection is based on differential reproductive success.
Genetic drift results from chance fluctuations in allele frequencies in small populations.
A population may lose or gain alleles by gene flow.
Concept 23.4 Natural selection is the primary mechanism of adaptive evolution
Genetic variation occurs within and between populations.
Let’s take a closer look at natural selection.
There are three modes of selection: directional, disruptive, and stabilizing.
Diploidy and balancing selection preserve genetic variation.
Sexual selection may lead to pronounced secondary differences between the sexes.
Sex is an evolutionary enigma.
Natural selection cannot fashion perfect organisms.
Lecture Outline for Campbell/Reece Biology, 7th Edition, © Pearson Education, Inc. 23-1
Chapter 24 The Origin of Species
Lecture Outline
Overview: That “Mystery of Mysteries”
Concept 24.1 The biological species concept emphasizes reproductive isolation
Prezygotic and postzygotic barriers isolate the gene pools of biological species.
The biological species concept has some major limitations.
Evolutionary biologists have proposed several alternative concepts of species.
Concept 24.2 Speciation can take place with or without geographic separation
Allopatric speciation: geographic barriers can lead to the origin of species.
Sympatric speciation: a new species can originate in the geographic midst of the parent species.
Researchers study the genetics of speciation.
The tempo of speciation is important.
Concept 24.3 Macroevolutionary changes can accumulate through many speciation events
Most evolutionary novelties are modified versions of older structures.
Genes that control development play a major role in evolution.
Evolution is not goal oriented.
Lecture Outline for Campbell/Reece Biology, 7th Edition, © Pearson Education, Inc. 24-1
Chapter 25 Phylogeny and Systematics
Lecture Outline
Overview: Investigating the Tree of Life
Concept 25.1 Phylogenies are based on common ancestries inferred from fossil, morphological, and molecular evidence
Sedimentary rocks are the richest source of fossils.
Morphological and molecular similarities may provide clues to phylogeny.
Concept 25.2 Phylogenetic systematics connects classification with evolutionary history
Taxonomy employs a hierarchical system of classification.
Classification and phylogeny are linked.
Concept 25.3 Phylogenetic systematics informs the construction of phylogenetic trees based on shared characters
The principles of maximum parsimony and maximum likelihood help systematists reconstruct phylogeny.
Phylogenetic trees are hypotheses.
Concept 25.4 Much of an organism’s evolutionary history is documented in its genome
Gene duplication has provided opportunities for evolutionary change.
Concept 25.5 Molecular clocks help track evolutionary time
There is a universal tree of life.
Lecture Outline for Campbell/Reece Biology, 7th Edition, © Pearson Education, Inc. 25-1
Chapter 26 The Tree of Life:
An Introduction to Biological Diversity
Lecture Outline
Overview: Changing Life on a Changing Earth
Concept 26.1 Conditions on early Earth made the origin of life possible
The first cells may have originated by chemical evolution on a young Earth.
Abiotic synthesis of organic monomers is a testable hypothesis.
Laboratory simulations of early-Earth conditions have produced organic polymers.
Protobionts can form by self-assembly.
RNA may have been the first genetic material.
Natural selection could refine protobionts containing hereditary information.
Concept 26.2 The fossil record chronicles life on Earth
Radiometric dating gives absolute dates for some rock strata.
Geologists have established a geologic record of Earth’s history.
Mass extinctions have destroyed the majority of species on Earth.
Concept 26.3 As prokaryotes evolved, they exploited and changed young Earth
Prokaryotes dominated evolutionary history from 3.5 to 2.0 billion years ago.
Metabolism evolved in prokaryotes.
Concept 26.4 Eukaryotic cells arose from symbioses and genetic exchanges between prokaryotes
Concept 26.5 Multicellularity evolved several times in eukaryotes
Animal diversity exploded during the early Cambrian period.
Plants, fungi, and animals colonized the land about 500 million years ago.
Earth’s continents drift across the planet’s surface on great plates of crust.
Concept 26.6 New information has revised our understanding of the tree of life
Lecture Outline for Campbell/Reece Biology, 7th Edition, © Pearson Education, Inc. 26-1
Chapter 27 Prokaryotes
Lecture Outline
Overview: They’re (Almost) Everywhere!
Concept 27.1 Structural, functional, and genetic adaptations contribute to prokaryotic success
Prokaryotes are small.
Nearly all prokaryotes have a cell wall external to the plasma membrane.
Many prokaryotes are motile.
The cellular and genomic organization of prokaryotes is fundamentally different from that of eukaryotes.
Populations of prokaryotes grow and adapt rapidly.
Concept 27.2 A great diversity of nutritional and metabolic adaptations have evolved in prokaryotes
Concept 27.3 Molecular systematics is illuminating prokaryotic phylogeny
Researchers are identifying a great diversity of archaea in extreme environments and in the oceans.
Concept 27.4 Prokaryotes play crucial roles in the biosphere
Prokaryotes are indispensable links in the recycling of chemical elements in ecosystems.
Many prokaryotes are symbiotic.
Concept 27.5 Prokaryotes have both harmful and beneficial impacts on humans
Humans use prokaryotes in research and technology.
ecture Outline for Campbell/Reece Biology, 7th Edition, © Pearson Education, Inc. 27-1
Chapter 28 Protists
Lecture Outline
Overview: A World in a Drop of Water
Concept 28.1 Protists are an extremely diverse assortment of eukaryotes
Endosymbiosis has a place in eukaryotic evolution.
Concept 28.2 Diplomads and parabasalids have modified mitochondria
Concept 28.3 Euglenozoans have flagella with a unique internal structure
Concept 28.4 Alveolates have sacs beneath the plasma membrane
Conjugation provides an opportunity for ciliates to eliminate transposons and other types of “selfish” DNA that can replicate within a genome.
Concept 28.5 Stramenopiles have “hairy” and smooth flagella
Some algae have life cycles with alternating multicellular haploid and diploid generations.
Concept 28.6 Cercozoans and radiolarians have threadlike pseudopodia
Concept 28.7 Amoebozoans have lobe-shaped pseudopodia
Concept 28.8 Red algae and green algae are the closest relatives of land plants
Lecture Outline for Campbell/Reece Biology, 7th Edition, © Pearson Education, Inc. 28-1
Chapter 29 Plant Diversity I: How Plants Colonized Land
Lecture Outline
Overview: The Greening of Earth
Concept 29.1 Land plants evolved from green algae
Concept 29.2 Land plants possess a set of derived terrestrial adaptations
Apical meristems
Alternation of generations
Walled spores produced by sporangia
Multicellular gametangia
Multicellular, dependent embryos
Land plants have diversified since their origin from algal ancestors.
Concept 29.3 The life cycles of mosses and other bryophytes are dominated by the gametophyte stage
Bryophyte sporophytes disperse enormous numbers of spores.
Bryophytes provide many ecological and economic benefits.
Concept 29.4 Ferns and other seedless vascular plants formed the first forests
Ferns and other seedless vascular plants flourished in the Carboniferous period.
Five main traits characterize modern vascular plants.
Life cycles with dominant sporophytes
Transport in xylem and phloem
Evolution of roots
Evolution of leaves
Sporophylls and spore variations
Classification of seedless vascular plants.
The significance of seedless vascular plants.
Lecture Outline for Campbell/Reece Biology, 7th Edition, © Pearson Education, Inc. 29-1
Chapter 30 Plant Diversity II: The Evolution of Seed Plants
Lecture Outline
Overview: Feeding the World
Concept 30.1 The reduced gametophytes of seed plants are protected in ovules and pollen grains
Heterospory is the rule among seed plants.
Seed plants produce ovules.
Pollen eliminated the liquid-water requirement for fertilization.
Seeds became an important means of dispersing offspring.
Concept 30.2 Gymnosperms bear “naked” seeds, typically on cones
The four phyla of extant gymnosperms are Cycadophyta, Ginkgophyta, Gnetophyta, and Coniferophyta.
The Mesozoic era was the age of gymnosperms.
The life cycle of a pine demonstrates the key reproductive adaptations of seed plants.
Concept 30.3 The reproductive adaptations of angiosperms include flowers and fruits
The flower is the defining reproductive adaptation of angiosperms.
Fruits help disperse the seeds of angiosperms.
The life cycle of an angiosperm is a highly refined version of the alternation of generations common to all plants.
The origin and evolution of angiosperms is complex.
Angiosperms are very diverse.
Animals and angiosperms share evolutionary links.
Concept 30.4 Human welfare depends greatly on seed plants
Agriculture is based almost entirely on angiosperms.
Plant diversity is a nonrenewable resource.
Lecture Outline for Campbell/Reece Biology, 7th Edition, © Pearson Education, Inc. 30-1
Chapter 31 Fungi
Lecture Outline
Overview: Mighty Mushrooms
Concept 31.1 Fungi are heterotrophs that feed by absorption
Absorptive nutrition enables fungi to live as decomposers and symbionts.
Extensive surface area and rapid growth adapt fungi for absorptive nutrition.
Concept 31.2 Fungi produce spores through sexual or asexual life cycles
Many fungi have a heterokaryotic stage.
Many fungi reproduce asexually.
Concept 31.3 Fungi descended from an aquatic, single-celled, flagellated protist
Phylum Chytridiomycota: Chytrids may provide clues about fungal origins.
Concept 31.4 Fungi have radiated into a diverse set of lineages
Phylum Zygomycota: Zygote fungi form resistant structures during sexual reproduction.
Microsporidia are unicellular parasites.
Glomeromycetes form mycorrhizae.
Phylum Ascomycota: Sac fungi produce sexual spores in saclike asci.
Phylum Basidiomycota: Club fungi have long-lived dikaryotic mycelia.
Concept 31.5 Fungi have a powerful impact on ecosystems and human welfare
Ecosystems depend on fungi as decomposers and symbionts.
Some fungi are pathogens.
Fungi are commercially important.
Lecture Outline for Campbell/Reece Biology, 7th Edition, © Pearson Education, Inc. 31-12
Chapter 32 An Introduction to Animal Diversity
Lecture Outline
Overview: Welcome to Your Kingdom
Concept 32.1 Animals are multicellular, heterotrophic eukaryotes with tissues that develop from embryonic layers
Concept 32.2 The history of animals may span more than a billion years
Neoproterozoic Era (1 billion–542 million years ago)
Paleozoic Era (542–251 million years ago)
Mesozoic Era (251–65.5 million years ago)
Cenozoic Era (65.5 million years ago to the present)
Concept 32.3 Animals can be characterized by “body plans”
Concept 32.4 Leading hypotheses agree on major features of the animal phylogenetic tree
Lecture Outline for Campbell/Reece Biology, 7th Edition, © Pearson Education, Inc. 32-1
Chapter 36 Transport in Vascular Plants
Lecture Outline
Overview: Pathways for Survival
Concept 36.1 Physical forces drive the transport of materials in plants over a range of distances
Transport at the cellular level depends on the selective permeability of membranes.
Proton pumps play a central role in transport across plant membranes.
Differences in water potential drive water transport in plant cells.
Aquaporins affect the rate of water transport across membranes.
Vacuolated plant cells have three major compartments.
Both the symplast and the apoplast function in transport within tissues and organs.
Bulk flow functions in long-distance transport.
Concept 36.2 Roots absorb water and minerals from the soil
Root hairs, mycorrhizae, and a large surface area of cortical cells enhance water and mineral absorption.
The endodermis functions as a selective sentry between the root cortex and vascular tissue.
Concept 36.3 Water and minerals ascend from roots to shoots through the xylem
The ascent of xylem sap depends mainly on transpiration and the physical properties of water.
Xylem sap ascends by solar-powered bulk flow: a review.
Concept 36.4 Stomata help regulate the rate of transpiration
Most leaves have broad surface areas and high ratios of surface area to volume.
Guard cells mediate the photosynthesis-transpiration compromise.
Xerophytes have evolutionary adaptations that reduce transpiration.
Concept 36.5 Organic nutrients are translocated through the phloem
Phloem translocates its sap from sugar sources to sugar sinks.
Pressure flow is the mechanism of translocation in angiosperms.
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Chapter 37 Plant Nutrition
Lecture Outline
Outline: A Nutritional Network
Concept 37.1 Plants require certain chemical elements to complete their life cycle
Plants require nine macronutrients and at least eight micronutrients.
The symptoms of a mineral deficiency depend on the function and mobility of the element.
Concept 37.2 Soil quality is a major determinant of plant distribution and growth
Soil texture and composition are key environmental factors in terrestrial ecosystems.
Soil conservation is one step toward sustainable agriculture.
Concept 37.3 Nitrogen is often the mineral that has the greatest effect on plant growth
The metabolism of soil bacteria makes nitrogen available to plants.
Improving the protein yield of crops is a major goal of agricultural research.
Concept 37.4 Plant nutritional adaptations often involve relationships with other organisms
Symbiotic nitrogen fixation results from intricate interactions between roots and bacteria.
The molecular biology of root nodule formation is increasingly well understood.
Mycorrhizae are symbiotic associations of roots and fungi that enhance plant nutrition.
Epiphytes nourish themselves but grow on other plants.
Parasitic plants extract nutrients from other plants.
Carnivorous plants supplement their mineral nutrition by digesting animals.
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Chapter 38 Angiosperm Reproduction and Biotechnology
Lecture Outline
Overview: To Seed or Not to Seed
Concept 38.1 Pollination enables gametes to come together within a flower
Sporophyte and gametophyte generations alternate in the life cycles of plants.
Flowers are specialized shoots bearing the reproductive organs of the angiosperm sporophyte.
Male and female gametophytes develop within anthers and ovaries, respectively; pollination brings them together.
Plants have various mechanisms that prevent self-fertilization.
Concept 38.2 After fertilization, ovules develop into seeds and ovaries into fruits
Double fertilization gives rise to the zygote and endosperm.
The ovule develops into a seed containing an embryo and a supply of nutrients.
The ovary develops into a fruit adapted for seed dispersal.
Evolutionary adaptations of seed germination contribute to seedling survival.
Concept 38.3 Many flowering plants clone themselves by asexual reproduction
Vegetative propagation of plants is common in agriculture.
Concept 38.4 Plant biotechnology is transforming agriculture
Neolithic humans created new plant varieties by artificial selection.
Plant biotechnology has incited much public debate.
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Chapter 39 Plant Responses to Internal and External Signals
Lecture Outline
Overview: Stimuli and a Stationary Life
Concept 39.1 Signal transduction pathways link signal reception to response
Concept 39.2 Plant hormones help coordinate growth, development, and responses to stimuli
Research on how plants grow toward light led to the discovery of plant hormones.
Plant hormones help coordinate growth, development, and responses to environmental stimuli.
Concept 39.3 Responses to light are critical for plant success
Blue-light photoreceptors are a heterogeneous group of pigments.
Phytochromes function as photoreceptors in many plant responses to light.
Biological clocks control circadian rhythms in plants and other eukaryotes.
Light entrains the biological clock.
Photoperiodism synchronizes many plant responses to changes of season.
Concept 39.4 Plants respond to a wide variety of stimuli other than light
Plants respond to environmental stimuli through a combination of developmental and physiological mechanisms.
Concept 39.5 Plants defend themselves against herbivores and pathogens
Plants deter herbivores with both physical and chemical defenses.
Plants use multiple lines of defense against pathogens.
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Chapter 40 Basic Principles of Animal Form and Function
Lecture Outline
Overview: Diverse Forms, Common Challenges
Concept 40.1 Physical laws and the environment constrain animal size and shape
Body size and shape affect interactions with the environment.
Concept 40.2 Animal form and function are correlated at all levels of organization
The organ systems of an animal are interdependent.
Concept 40.3 Animals use the chemical energy in food to sustain form and function
Metabolic rate provides clues to an animal’s bioenergetic “strategy.”
Body size influences metabolic rate.
Animals adjust their metabolic rates as conditions change.
Energy budgets reveal how animals use energy and materials.
Concept 40.4 Many animals regulate their internal environment within relatively narrow limits
Animals may be regulators or conformers for a particular environmental variable.
Homeostasis depends on feedback circuits.
Concept 40.5 Thermoregulation contributes to homeostasis and involves anatomy, physiology, and behavior
Ectotherms and endotherms manage their heat budgets very differently.
Animals regulate the exchange of heat with their environment.
Animals can acclimatize to a new range of environmental temperatures.
Animals may conserve energy through torpor.
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Chapter 41 Animal Nutrition
Lecture Outline
Overview: The Need to Feed
Concept 41.1 Homeostatic mechanisms manage an animal’s energy budget
Obesity is a global health problem.
Concept 41.2 An animal’s diet must supply carbon skeletons and essential nutrients
Concept 41.3 The main stages of food processing are ingestion, digestion, absorption, and elimination
Digestion occurs in specialized compartments.
Concept 41.4 Each organ of the mammalian digestive system has specialized food-processing functions
The oral cavity, pharynx, and esophagus initiate food processing.
The stomach stores food and performs preliminary digestion.
The small intestine is the major organ of digestion and absorption.
Reclaiming water is a major function of the large intestine.
Concept 41.5 Evolutionary adaptations of vertebrate digestive systems are often associated with diet
Symbiotic microorganisms help nourish many vertebrates.
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Chapter 42 Circulation and Gas Exchange
Lecture Outline
Overview: Trading with the Environment
Concept 42.1 Circulatory systems reflect phylogeny
Most invertebrates have a gastrovascular cavity or a circulatory system for internal transport.
Vertebrate phylogeny is reflected in adaptations of the cardiovascular system.
Concept 42.2 Double circulation in mammals depends on the anatomy and pumping cycle of the heart
Concept 42.3 Physical principles govern blood circulation
Physical laws governing the movement of fluids through pipes affect blood flow and blood pressure.
Transfer of substances between the blood and the interstitial fluid occurs across the thin walls of capillaries.
The lymphatic system returns fluid to the blood and aids in body defense.
Concept 42.4 Blood is a connective tissue with cells suspended in plasma
Cardiovascular diseases are the leading cause of death in the United States and most other developed nations.
Concept 42.5 Gas exchange occurs across specialized respiratory surfaces
Gills are respiratory adaptations of most aquatic animals.
Tracheal systems and lungs are respiratory adaptations of terrestrial animals.
Concept 42.6 Breathing ventilates the lungs
Control centers in the brain regulate the rate and depth of breathing.
Concept 42.7 Respiratory pigments bind and transport gases
Gases diffuse down pressure gradients in the lungs and other organs.
Elite animal athletes have adaptations that allow them to meet extreme oxygen demands.
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Chapter 43 The Immune System
Lecture Outline
Overview: Reconnaissance, Recognition, and Response
Concept 43.1 Innate immunity provides broad defenses against infection
The skin and mucous membrane provide first-line barriers to infection.
Phagocytic cells and antimicrobial proteins function early in infection.
Invertebrates also have highly effective innate defenses.
Concept 43.2 In acquired immunity, lymphocytes provide specific defenses against infection
Lymphocytes provide the specificity and diversity of the immune system.
Lymphocyte development gives rise to an immune system that distinguishes self from nonself.
Antigens interact with specific lymphocytes, inducing immune responses and immunological memory.
Concept 43.3 Humoral and cell-mediated immunity defend against different types of threats
Helper T lymphocytes function in both humoral and cell-mediated immunity.
In the cell-mediated response, cytotoxic T cells counter intracellular pathogens.
In the humoral response, B cells make antibodies against extracellular pathogens.
Immunity can be achieved naturally or artificially.
Concept 43.4 The immune system’s ability to distinguish self from nonself limits tissue transplantation
Concept 43.5 Exaggerated, self-directed, or diminished immune responses can cause disease
AIDS is an immunodeficiency disease caused by a virus.
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Chapter 44 Osmoregulation and Excretion
Lecture Outline
Overview: A Balancing Act
Concept 44.1 Osmoregulation balances the uptake and loss of water and solutes
Osmoregulators expend energy to control their internal osmolarity; osmoconformers are isoosmotic with their surroundings.
Water balance and waste disposal depend on transport epithelia.
Concept 44.2 An animal’s nitrogenous wastes reflect its phylogeny and habitat
Concept 44.3 Diverse excretory systems are variations on a tubular theme
Most excretory systems produce urine by refining a filtrate derived from body fluids.
Concept 44.4 Nephrons and associated blood vessels are the functional units of the mammalian kidney
Concept 44.5 The mammalian kidney’s ability to conserve water is a key terrestrial adaptation
Concept 44.6 Diverse adaptations of the vertebrate kidney have evolved in different environments
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Chapter 45 Hormones and the Endocrine System
Lecture Outline
Overview: The Body’s Long-Distance Regulators
Concept 45.1 The endocrine system and the nervous system act individually and together in regulating an animal’s physiology
Concept 45.2 Hormones and other chemical signals bind to target cell receptors, initiating pathways that culminate in specific cell responses
Water-soluble hormones have cell-surface receptors.
Lipid-soluble hormones have intracellular receptors.
A variety of local regulators affect neighboring target cells.
Concept 45.3 The hypothalamus and pituitary integrate many functions of the vertebrate endocrine system
Concept 45.4 Nonpituitary hormones help regulate metabolism, homeostasis, development, and behavior
Thyroid hormones function in development, bioenergetics, and homeostasis.
Parathyroid hormone and calcitonin balance blood calcium.
Endocrine tissues of the pancreas secrete insulin and glucagon, antagonistic hormones that regulate blood glucose.
The adrenal medulla and adrenal cortex help the body manage stress.
Gonadal steroids regulate growth, development, reproductive cycles, and sexual behavior.
The pineal gland is involved in biorhythms.
Concept 45.5 Invertebrate regulatory systems also involve endocrine and nervous system interactions
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Chapter 46 Animal Reproduction
Lecture Outline
Overview: Doubling Up for Sexual Reproduction
Concept 46.1 Both asexual and sexual reproduction occur in the animal kingdom
Diverse mechanisms of asexual reproduction enable animals to produce identical offspring rapidly.
Reproductive cycles and patterns vary extensively among mammals.
Concept 46.2 Fertilization depends on mechanisms that help sperm meet eggs of the same species
Reproductive systems produce gametes and make them available to gametes of the opposite sex.
Concept 46.3 Reproductive organs produce and transport gametes: focus on humans
Human reproduction involves intricate anatomy and complex behavior.
Human sexual response is very complex.
Concept 46.4 In humans and other mammals, a complex interplay of hormones regulates gametogenesis
Spermatogenesis and oogenesis both involve meiosis but differ in three significant ways.
The principle sex hormones in the male are the androgens.
Concept 46.5 In humans and other placental mammals, an embryo grows into a newborn in the mother’s uterus
Modern technology offers solutions for some reproductive problems.
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Chapter 47 Animal Development
Lecture Outline
Overview: A Body-Building Plan for Animals
From egg to organism, an animal’s form develops gradually.
Concept 47.1 After fertilization, embryonic development proceeds through cleavage, gastrulation, and organogenesis
Fertilization activates the egg and brings together the nuclei of sperm and egg.
Cleavage partitions the zygote into many smaller cells.
Gastrulation rearranges the blastula to form a three-layered embryo with a primitive gut.
In organogenesis, the organs of the animal body form from the three embryonic germ layers.
Amniote embryos develop in a fluid-filled sac within a shell or uterus.
Mammalian development has some unique features.
Concept 47.2 Morphogenesis in animals involves specific changes in cell shape, position, and adhesion
Concept 47.3 The developmental fate of cells depends on their history and on inductive signals
Fate mapping can reveal cell genealogies in chordate embryos.
The eggs of most vertebrates have cytoplasmic determinants that help establish the body axes.
Inductive signals play an important role in cell fate determination and pattern formation.
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Chapter 48 Nervous Systems
Lecture Outline
Overview: Command and Control Center
The ability of cells to respond to the environment has evolved over billions of years.
Concept 48.1 Nervous systems consist of circuits of neurons and supporting cells
Nervous systems show diverse patterns of organization.
Nervous systems consist of circuits of neurons and supporting cells.
Networks of neurons with intricate connections form nervous systems.
Concept 48.2 Ion pumps and ion channels maintain the resting potential of a neuron
Every cell has a voltage, or membrane potential, across its plasma membrane.
Concept 48.3 Action potentials are the signals conducted by axons
Nerve impulses propagate themselves along an axon.
Concept 48.4 Neurons communicate with other cells at synapses
Neural integration occurs at the cellular level.
The same neurotransmitter can produce different effects on different types of cells.
Concept 48.5 The vertebrate nervous system is regionally specialized
Vertebrate nervous systems have central and peripheral components.
The divisions of the peripheral nervous system interact in maintaining homeostasis.
Embryonic development of the vertebrate brain reflects its evolution from three anterior bulges of the neural tube.
Evolutionarily older structures of the vertebrate brain regulate essential automatic and integrative functions.
The cerebrum is the most highly developed structure of the mammalian brain.
Concept 48.6 The cerebral cortex controls voluntary movement and cognitive functions
Concept 48.7 CNS injuries and diseases are the focus of much research
The nervous system has a number of diseases and disorders.
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Chapter 50 An Introduction to Ecology and the Biosphere
Lecture Outline
Overview: The Scope of Ecology
Concept 50.1 Ecology is the study of interactions between organisms and the environment
Ecology and evolutionary biology are closely related sciences.
Ecological research ranges from the adaptations of individual organisms to the dynamics of the biosphere.
Ecology provides a scientific context for evaluating environmental issues.
Concept 50.2 Interactions between organisms and the environment limit the distribution of species
Species dispersal contributes to the distribution of organisms.
Behavior and habitat selection contribute to the distribution of organisms.
Biotic factors affect the distribution of organisms.
Abiotic factors affect the distribution of organisms.
Four abiotic factors are the major components of climate.
Concept 50.3 Abiotic and biotic factors influence the structure and dynamics of aquatic biomes
Aquatic biomes occupy the largest part of the biosphere.
Concept 50.4 Climate largely determines the distribution and structure of terrestrial biomes
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Chapter 51 Behavioral Ecology
Lecture Outline
Overview: Studying Behavior
Concept 51.1 Behavioral ecologists distinguish between proximate and ultimate causes of behavior
Classical ethology presaged an evolutionary approach to behavioral biology.
Concept 51.2 Many behaviors have a strong genetic component
Behavior results from both genes and environmental factors.
Many animal movements are under substantial genetic influence.
Animal communication is an essential component of interactions between individuals.
Prairie vole mating and parental behaviors are under strong genetic influence.
Concept 51.3 Environment, interacting with an animal’s genetic makeup, influences the development of behaviors
The fitness of an organism may be enhanced by the capacity for spatial learning.
Many animals can learn to associate one stimulus with another.
The study of cognition connects behavior with nervous system function.
Varying degrees of genetic and environmental factors contribute to the learning of complex behavior.
Concept 51.4 Behavioral traits can evolve by natural selection
Behavior varies in natural populations.
Experiments provide evidence for behavioral evolution.
Concept 51.5 Natural selection favors behaviors that increase survival and reproductive success
Sexual selection is a form of natural selection.
Game theory can model behavioral strategies.
Concept 51.6 The concept of inclusive fitness can account for most altruistic social behavior
Animals learn by observing others.
Sociobiology places social behavior in an evolutionary context.
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Chapter 52 Population Ecology
Lecture Outline
Overview: Earth’s Fluctuating Populations
Concept 52.1 Dynamic biological processes influence population density, dispersion, and demography
Two important characteristics of any population are density and the spacing of individuals.
Demography is the study of factors that affect population density and dispersion patterns.
Concept 52.2 Life history traits are products of natural selection
Life histories are highly diverse, but they exhibit patterns in their variability.
Limited resources mandate trade-offs between investment in reproduction and survival.
Concept 52.3 The exponential model describes population growth in an idealized, unlimited environment
Concept 52.4 The logistic growth model includes the concept of carrying capacity
Concept 52.5 Populations are regulated by a complex interaction of biotic and abiotic influences
Negative feedback prevents unlimited population growth.
Concept 52.6 Human population growth has slowed after centuries of exponential increase
Estimating Earth’s carrying capacity for humans is a complex problem.
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Chapter 53 Community Ecology
Lecture Outline
Overview: What Is a Community?
Concept 53.1 A community’s interactions include competition, predation, herbivory, symbiosis, and disease
Concept 53.2 Dominant and keystone species exert strong controls on community structure
Species diversity is a fundamental aspect of community structure.
Trophic structure is a key factor in community dynamics.
The structure of a community may be controlled from the bottom up by nutrients or from the top down by predators.
Concept 53.3 Disturbance influences species diversity and composition
Humans are the most widespread agents of disturbance.
Ecological succession is the sequence of community changes after a disturbance.
Concept 53.4 Biogeographic factors affect community biodiversity
Species richness generally declines along an equatorial-polar gradient.
Species richness is related to a community’s geographic size.
Species richness on islands depends on island size and distance from the mainland.
Concept 53.5 Contrasting views of community structure are the subject of continuing debate
The debate continues with the rivet and redundancy models.
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Chapter 54 Ecosystems
Lecture Outline
Overview: Ecosystems, Energy, and Matter
Concept 54.1 Ecosystem ecology emphasizes energy flow and chemical cycling
Ecosystems obey physical laws.
Trophic relationships determine the routes of energy flow and chemical cycling in ecosystems.
Decomposition connects all trophic levels.
Concept 54.2 Physical and chemical factors limit primary production in ecosystems
An ecosystem’s energy budget depends on primary production.
In aquatic ecosystems, light and nutrients limit primary production.
In terrestrial ecosystems, temperature and moisture are the key factors limiting primary production.
Concept 54.3 Energy transfer between trophic levels is usually less than 20% efficient
Herbivores consume a small percentage of vegetation: the green world hypothesis.
Concept 54.4 Biological and geochemical processes move nutrients between organic and inorganic parts of the ecosystem
There are a number of important biogeochemical cycles.
The water cycle
The carbon cycle
The nitrogen cycle
The phosphorus cycle
Decomposition rates largely determine the rates of nutrient cycling.
Nutrient cycling is strongly regulated by vegetation.
Concept 54.5 The human population is disrupting chemical cycles throughout the biosphere
The human population moves nutrients from one part of the biosphere to another.
Combustion of fossil fuels is the main cause of acid precipitation.
Toxins can become concentrated in successive trophic levels of food webs.
Human activities may be causing climate change by increasing atmospheric carbon dioxide.
Human activities are depleting atmospheric ozone.
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Chapter 55 Conservation Biology and Restoration Ecology
Lecture Outline
Overview: The Biodiversity Crisis
Concept 55.1 Human activities threaten Earth’s biodiversity
The three levels of biodiversity are genetic diversity, species diversity, and ecosystem diversity.
Biodiversity at all three levels is vital to human welfare.
The four major threats to biodiversity are habitat destruction, introduced species, overexploitation, and disruption of interaction networks.
Concept 55.2 Population conservation focuses on population size, genetic diversity, and critical habitat
The declining-population approach is a proactive conservation strategy for detecting, diagnosing, and halting population declines.
Conserving species involves weighing conflicting demands.
Concept 55.3 Landscape and regional conservation aim to sustain entire biotas
Edges and corridors can strongly influence landscape biodiversity.
Conservation biologists face many challenges in setting up protected areas.
Nature reserves must be functional parts of landscapes.
Concept 55.4 Restoration ecology attempts to restore degraded ecosystems to a more natural state
Concept 55.5 Sustainable development seeks to improve the human condition while conserving biodiversity
The future of the biosphere may depend on our biophilia.
Lecture Outline for Campbell/Reece Biology, 7th Edition, © Pearson Education, Inc. 55-1
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