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Unit 2: In AP Classroom, Complete Personal Progress Check MCQ, FRQ Part A, FRQ Part B Unit 3: Early Europe and Colonial America (200–1750CE) Topics Skills 3.1 Cultural Contexts of Early European and ColonialAmerican Art 2.A, 2.D 3.2 Interactions Within and Across Cultures in EarlyEuropean and Colonial American Art 4.C, 3.B, 4.A, 4.B, 4.Da) Lakes don't freeze solid in winter, despite low temperatures. b) A water strider can walk across the surface of a small pond. c) Organisms resist temperature changes, although they give off heat due to chemical reactions. d) Evaporation of sweat from the skin helps to keep people from overheating.May aid in the transport of materials from one side of the membrane to the other. B. Membrane proteins of adjacent cells may hook together in various kinds of junctions. C. May be an enzyme or series of enzymes involved in metabolic pathways. D. May be a membrane carbohydrate used for cell-to-cell recognition. 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Which of the following statements correctly explains the observed effect of the acetylcholine concentration on the rate of the enzyme-catalyzed reaction? The active site of AChE is specific for acetylcholine, and only one substrate molecule can occupy the active site at a time.23. In graphing the data from this experiment, the sampling time would be shown on the X axis because. E. Sampling time is the independent variable. 24. A student placed a semi permeable February and inside a U-shaped channel with two chambers, I showed. The membrane permits the moving of water but not so.In a certain small mammal, fur color is controlled by a pair of alleles, with B being dominant over b. The genotypes BB and Bb result in dark-colored fur, the genotype bb results in light-colored fur. A population of the species has the following allele frequencies: B=0.85 and b=0.15. 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