Answers for Study Questions on Natural selection F09

Answers for Study Questions on Natural selection F09 - BIS...

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BIS 2B F09 Study Questions For Lectures 11 and 12 1. Georges Cuvier was one of the many scientists who studied fossils. He observed fossilized marine forms in places that were now mountain tops, found fossils of organisms that no longer existed, and noticed that fossil forms appeared to change from older to younger strata. Which explanation for these observations did he prefer? a) all geological processes that operate now, operated then b) high reproductive rates resulted in limited survival of each type c) a series of great catastrophes occurred in each environment d) organisms evolved in some places and became extinct in others e) continents had moved, altering the distributions of many species 2. Which of the observations below would support the idea that controlling which individuals were permitted to mate could have a large effect on the phenotypes of offspring? a) the naturally-occurring variation within a population b) the results of plant and animal breeding trials c) the similarity between birds on two islands d) the fossil record for shelled animals e) the similarity between parents and offspring 3. True/False: there is much more variation in skull morphology among wild members of the canid (dog) family than there is among breeds of domestic dogs. FALSE—the domestic breeds are highly variable 4. How would you distinguish artificial selection from natural selection? In artificial selection the types that survive are preferred by human breeders and not selected for their match to the environment. 5. To compare rates of evolution in elephants and fruitflies, one should compare populations across: a) years b) the time needed for development c) individual lifetimes d) generation times e) centuries
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6. Egyptians first bred cattle thousands of years ago. What did they use to estimate the heritability of particular characters? a) the number of offspring produced by each breeding pair b) the fraction of offspring that survived in each pair c) the degree of resemblance between parents and offspring d) the variation in character types within each population e) the tendency of domesticated animals to breed with wild relatives 7. Goannas are big (6 ft.) lizards that live in Australia. They eat birds, eggs, and small lizards. Some goannas eat toads often and others rarely do. When poisonous toads were introduced into Australia some goannas died, but the population rebounded quickly. Natural selection probably acted on the goanna population; describe the 3 conditions necessary for natural selection to act in this case and
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This note was uploaded on 03/23/2011 for the course BIS 2B taught by Professor Strong during the Spring '08 term at UC Davis.

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Answers for Study Questions on Natural selection F09 - BIS...

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