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AP Biology Evolution (Campbell) Flashcards

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6202691523Carolus Linnaeus-physician and botanist who sought to classify life's diversity -binomial nomenclature (Homo sapien) -nested classification system, placing similar species into general characters0
6202691524Fossils-darwin drew from these (the remains or traces of organisms from the past)1
6202691525Strata-new layers of sediment cover older ones and compress them into layers of rock called strata -strata reveal the pattern of evolution that a species may take2
6202691526Paleontology-study of fossils, developed by Georges Cuvier 0noted that the older the stratum the more dissimilar fossils were to current life-forms -from one layer to the next, new species appeared while others disappeared -each boundary represented a sudden catastrophic event3
6202691527Charles Lyell-incorporated Hutton's thinking into his proposal that the same geologic processes are operating today as in the past, and at the same rate4
6202691528Jean-Baptiste Lamarck-found several lines of descent, a chronological series of older to younger fossils leading to a living species -use and disuse (giraffes' neck)5
6202691529Wallace-writes a paper with a similar hypothesis to Darwin based on the Malay archipelago6
6202691530Darwin-HMS beagle, interested in species in the galapagos (turtles, finches)7
6202691531Artificial Selection-modification of other species over many generations by selecting and breeding individuals with desired traits8
6202691532Darwin's 2 Inferenences-All species and produce more offspring than their enviorment can support and many of these offspring fail to survive and reproduce -This unequal ability of individuals to survive and reproduce will lead to the accumulation of favorable traits in the population over generations9
6202691533Homology-similarity resulting from common ancestry10
6202691534Homologous Structures-represent variations on a structural theme that was present in a common ancestor11
6202691535Vestigal Structures-remnants of features that served a function in the organism's ancestors12
6202691536Convergent Evolution-independent evolution of similar features in different lineages -ex: marsupials and sugar glider (same environment) -can occur when similar environmental pressures and natural selection exists13
6202691537Analogous-species share features b/c of convergent evolution, share similar function but not common ancesty14
6202691538Biogeography-scientific study of the geographic distributions of species15
6202691539Phylogeny-evolutionary history of a species or group of species16
6202691540Systematics-discipline focused on classifying organisms and determining their evolutionary realationships17
6202691541Taxonomy-study of how organisms are named and classifed18
6202691542Order of ClassificationDomain, Kingdom, Phylum, Class, Order, Family, Genius, Species19
6202691543Sister Taxa-groups of organism that share an immediate common ancestor20
6202691544Rooted-branch point within the tree21
6202691546Analogy-similarity due to convergent evolution22
6202691549Clades-each of which includes an ancestral species of all its descendants23
6202691553Shared Ancestral Character-character that originated in an ancestor of the taxon24
6202691554Shared Derived Character-evolutionary novelty unique to a clade25
6202691557Molecular Clock-an approach for measuring the absolute time of evolutionary change based on the observation that some gens and other regions of genomes appear to evolve at constant rates26
6202691558Microevolution-a change in allele frequencies in a population over generations27
6202691559Genetic Variation-differences among individuals in the composition of their genes or other DNA sequences28
6202691560Population-group of individuals of the same species that live in the same area and interbreed creating fertile offspring29
6202691561Gene Pool-all copies of every type of allele at every locus in all members of the population30
6202691562Hardy-Weinberg Conditions-no mutations -random mating -no natural selection -very large population size -no gene flow31
6202691563Genetic Drift-chance events can alter allele allele frequencies to fluctuate from one generation to another (especially in one generation to another)32
6202691564Founder Effect-when few individuals become isolated from a larger population this smaller group may make a new population whose gene pool differs from the source population33
6202691565Bottleneck Effect-a severe drop in population results in the over or under representation of certain alleles.34
6202691566Gene Flow-transfer of allele into or out of a population from the movement of fertile individuals or their gametes35
6202691567Effects of Genetic Drift-Genetic Drift is significant in small populations -Genetic drift can cause allele frequencies to change at random -Genetic drift can lead to a loss of genetic variation within populations -Genetic drift can cause harmful alleles to become fixed36
6202691568Adaptive Evolution-NS increases the frequency of allele that provide an advantage and reproduce more37
6202691569Relative Fitness-contribution an individual makes to the gene pool relative to the contributions of indivdauls38
6202691570Directional Selection-conditions father shifting traits to one extreme39
6202691571Disruptive Selection-conditions favor individuals at both extremes of a phenotypic range40
6202691572Stabilizing Selection-reduces variation and gets rid of extreme phenotypes in the population41
6202691573Sexual Selection-form of natural selection in which individuals with certain inherited characteristics are more likely than others to obtain maits42
6202691574Sexual Dismorphism-difference in secondary sexual characteristics between males and females of the same species43
6202691575Intersexual Selection-individuals of one sex are choosy in selecting mates44
6202691576Neutral Variation-differences in DNA sequence that do not confer a selective advantage or disadvantage45
6202691577Balancing Selection-occurs when natural selection amintains two or more forms in a population46
6202691578Heterozygote Selection-individuals who are heterozygotes at a particular locus have a greater fitness than both kinds of homozygotes47
6202691581Species (according to the biological species concept)-group of population whose members have the potential to interbreed in nature and have the potential to produce viable, fertile offspring but do not48
6202691582Macroevolution-broad pattern of evolution above the species level49
6202691583Reproductive Isolation-existance of biological barriers that impede members of two species from interbreeding and producing viable, fertile offspring50
6202691584Hybrid-offspring from an interspecific mating51
6202691585Prezygotic Barriers-block fertilization from occuring52
6202691586Postzygotic Barriers-contribute to reproductive isolation after the hybrid zygote is formed53
6202691587Prezygotic Barrier Examples1. Habtitat Isolation 2. Temporal Isolation (nocturnal) 3. Behavior Isolation (courtship rituals) 4. Mechanical Isolation (snail shells) 5. Genetic Isolation (sperm can't survive in reproductive tract) HTBMG54
6202691588Postzygotic Barrier Examples1. Reduced Hybrid Viability (hybrid survivabilty is reduced) 2. Reduced Hybrid Fertility (mule) 3. Hybrid Breakdown (one hybrids mate with one another offspring of the next generation are feeble/sterile) VFB55
6202691592Allopatric Speciation + Evidence-gene flow is interrupted when a population is divided into geographically isolated subpopulations -ex: snapping shrimp 30 species off the isthmus of panama56
6202691593Sympatric Speciation-speciation occurs in populations that live in the same geographic area57
6202691594Polyploidy-species may originate from an accident during cell divison resulting in extra chromsomes58
6202691601Punctuated Equilibria-Eldrege and Gould coined this to descibed these patterns in the fossil record: perioids of apparent stastis (moment of stability) punctuated by suddenc hange59
6202691602Radiometric Dating-based on the decay or radioactive isotopes -radioactive "parent" isotopes decay to "daughter" isotopes at a characteristic rate called a HALF LIFE60
6202691603Geologic Record-a standard time scale that divides the Earth's history into four eons and further subdivisions EON: Phanerozo(Mesozoic & Jurassic), Proterozoic, Archean, Hadean61
6202691604Mass Extinction-large numbers of a species become extinct world wide, caused by disruptive changes to the global enviroment62
6202691605Adaptive Radiations-periods of evolutionary change in which groups of organisms form many new species whose adaptations allow them to fill different ecological roles or niches in their communities63
6202691608Hypothesis for creation of Earth's First Life1. Abiotic synthesis of small organic molecules, monomers 2. Joining of these small molecules into macromolecules like proteins and nucleic acids, polymers 3. Packaging of these molecules into protobiont cells- droplets with membranes that maintained an internal chemsitry different than their surrondings 4. Origin of self-replicating molecules that made inheritance possible64
6202691609Ribozyme-RNA can perform many enzyme like, catalytic functions65
6202691610EndosymbiosisA process in which a unicellular organism (the "host") engulfs another cell, which lives within the host cell and ultimately becomes an organelle in the host cell; also refers to the hypothesis that mitochondria and plastids were formerly small prokaryotes that began living within larger cells.66

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