Practise Questions Jan. 2012 Key

B the lizards fight for the available food share what

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Unformatted text preview: frequency-dependent selection. e. genetic drift. 32. What do you think happens among lizards of a certain species when the food supply is limited? a. The lizards cooperate to find food & share what they find. b. The lizards fight for the available food & share what they find. c. Genetic changes that would allow lizards to eat new food sources are likely to be induced. d. The lizards least successful in the competition for food are likely to die of starvation or malnutrition. 33. Seals that live in Alaska have a fat layer; however their ancestors may not have had fat as thick as it is today. Over the centuries, changes in seals have occurred because: a. The need to keep warm caused the fat of every seal to get thicker. b. The seals needed to adapt to their surroundings. c. Each generation more seals have had thicker fat, because the fat layer is the sum of the parents’ fat layer. d. Each generation more seals have had thicker fat, because the few individuals that had a thicker fat layer lived to produce more offspring. 34. What would happen if a breeding pair of finches was placed on an island under ideal conditions with no predators & unlimited food, so that all the individuals survived. a. The finch population would stay small because finches only have enough offspring to replace themselves. b. The finch population would double & then stay relatively stable. c. The finch population would increase dramatically. d. The finch population would grow slowly & then level off. PRACTISE QUESTIONS BIOL 1001 W2012 Key 35. Which one of the following is NOT a factor involved in the theory of evolution BY NATURAL SELECTION? a. Organisms reproduce beyond the limits of the environment that supports them. b. Food supplies keep pace with the growth of populations feeding them. c. Population sizes of organisms tend to remain relatively stable through time. d. There is much variation in the characteristics of organisms making up a population. 36. In mammals, young born from pregnancies...
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This test prep was uploaded on 02/20/2014 for the course BIOLOGY 1001 taught by Professor Tamarakelly during the Spring '13 term at York University.

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