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Biology

Chapter 9-Cellular Reproduction

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Chapter 9: Cellular Reproduction CELLULAR GROWTH -As the cell grows, its volume increases much more rapidly than the surface area. -The cell might have difficulty supplying nutrients and expelling enough waste products. TRANSPORT OF SUBSTANCES -Substances move by diffusion or by motor proteins. -Diffusion over large distances is slow and inefficient. -Small cells maintain more efficient transport systems. CELLULAR COMMUNICATIONS -The need for signling proteins to move throughout the cell also limits cell size. -Cell size affects the ability of the cell to communicate instructions for cellular functions. THE CELL CYCLE -Cell division prevents the cell from becoming too large -It also is the way the cell reproduces so that you grow and heal certain injuries

Big Ideas

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Big Idea 1: The process of evolution drives the diversity and unity of life Enduring Understanding 1.A- Change in the genetic makeup of a population over time is evolution Essential knowledge 1.A.1: Natural selection is a major mechanism of evolution According to Darwin's theory of natural selection, competition for limited resources results in differential survival. Individuals with more favorable phenotypes are more likely to survive and produce more offspring thus passing traits to subsequent generation. (Fitness) Evolutionary fitness is measured by reproductive success Genetic variation and mutation play roles in natural selection. A diverse gene pool is important for the survival of a species in a changing environment.

Gruber Word List 2

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advent?an arrival adventitious?accidental adversity?misfortune advocate?to support aesthetic?pertaining to beauty affable?friendly affected?artificial affidavit?a sworn statement in writing affinity?a close relationship affirmation?assertion affluent?wealthy affray?a noisy quarrel affront?an insult agenda?a program agglomerate?to gather into a mass aggrandize?to make greater aggravate?to make worse aggregate?a group of things together aggrieved?wronged aghast?horrified agile?nimble agnostic?one who doesn?t know agrarian?agricultural akimbo?with hands on hips alacrity?eagerness albeit?although alchemy?early chemistry alienate?to make unfriendly allay?to calm allege?to declare allegory?a symbolic story alleviate?to relieve

DNA, RNA, and Protein Synthesis

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DNA, RNA, and Protein Synthesis DNA -The species-particular DNA sequences produce the species-particular proteins -Genes code for proteins -Genes are long strands of DNA of chromosomes WHAT IS DNA? -DNA is genetic code -Instructions for heredity -Components of genes -Director of protein synthesis -A type of nucleic acid -A type of organic compound -A polymer {a compound made of repeating subunits} DNA'S PROPER NAME IS -Deoxyribonucleic acid -Consists of a ribose sugar with a "missing oxygen" (thats the de-oxy part) -And it's found in the nucleus of eukaryotic cell STRUCTURE OF DNA -A nucleotide of DNA is the base unit -A nucleotide consists of a phosphate, a sugar, and a nitrogen base DNA IS A DOUBLE STRAND -The nitrogen bases have compliment partners

Chapter 7: Cellular Structure and Function

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Chapter 7: Cellular Structure and Function THE CELL THEORY -All organisims are composed of one or more cells -The cell is the basic unit of structure and organization of organisms -All cells come from pre-existing cells PROKARYOTIC CELL -Simple structure -Contains a plasma membrane -Does not contain membrane bound organelles EUKARYOTIC CELL -Contains a plasma membranre -Contains membrane-bound organelles PLASMA MEMBRANE -Thin, flexible boundary between the cell and its enviornment -Allows nutrients into the cell -Allows waste to leave the cell SELECTIVE PERMEABILITY -The plasma membrane controls the movement of substances into and out of the cell -The plasma membrane is composed of the phospholipid bilayer FLUID MOSAIC MODEL

Bio_SG_Final_Exam

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Biol 160 Study Guide ? Final Exam 1. Be able to describe what science and a scientific concept are. 2. Be able to define what is and isn?t biology. 3. Know the levels of organization of life that define the scope of biology. 4. What is an atom made of? What charge does each part have? 5. What determines the atomic number of an atom? 6. What is the difference between an ionic and a covalent bond? 7. What is the difference between polar and nonpolar molecules? 8. What is hydrogen bonding and why is it important? 9. What is the general form of a chemical reaction and what are the reactants vs products? 10. How are monomers and polymers related? Be able to describe and recognize a dehydration and hydrolysis reaction.

Bio_SG

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Biology 160 Study Guide #5 1. Be able to write the basic reaction that describes cellular respiration 2. What are the three main stages of cellular respiration? Be able to say what goes in and what comes out of each of these stages. 3. What is chemiosmosis (be able to describe the process)? 4. What is the form of energy actually used by your body? 5. What happens if you don?t have oxygen? 6. What is fermentation? 7. Be able to describe how the three main forms of nutrition are used for energy or made by the reverse of these cycles. 8. What is the basic mechanism responsible for global warming? 9. What are the central themes in the theory of natural selection? 10. How has the fossil record been preserved?

Bio_160_Lecture4

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Gene Expression Chapter 11 ? Differentiation yields a variety of cell types, each expressing a different combination of genes ? Different types of cells make different proteins because different combinations of genes are active in each type Muscle cell Pancreas cells Blood cells Fiure 11.2 Differentiated cells may retain all of their genetic potential Most differentiated cells retain a complete set of genes Root of carrot plant Root cells cultured in nutrient medium Cell division in culture Plantlet Adult Plant Single cell Figure 11.3 DNA packing in eukaryotic chromosomes helps regulate gene expression ? A chromosome contains DNA wound around clusters of histone proteins ? This beaded fiber is further wound and folded

Bio_160_Lecture5

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Metabolism and Photosynthesis Chapters 6 & 7 Autotrophs Chloroplasts ? Contain chlorophyll ? Green ? Site of photosynthesis ? Concentrated in leaves Chloroplast Structure Overview of Photosynthesis ? Light Reaction (stage 1) ? Occurs in thylakoid membranes of granna ? Converts light energy to chemical energy ? O2 produced as waste product ? Calvin Cycle (stage 2) ?Melvin Calvin ? Occurs in stroma of chloroplasts ? Synthesizes sugar molecules with CO2 & energy produced in light reactions ? The light reactions ? Convert light energy to chemical energy and produce O2 ? The Calvin cycle assembles sugar molecules from CO2 ? Using ATP and NADPH from the light reactions Figure 7.5 Light CO2H2O Chloroplast LIGHT REACTIONS (in thylakoids) CALVIN CYCLE

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