2NH3#Question id: 4985
#Unit 11. Evolution and Behavior
The loss of ventral spines by modern freshwater sticklebacks is due to natural selection operating on the phenotypic affects of Pitx1 gene
#Question id: 4984
#Unit 11. Evolution and Behavior
A hypothetical mutation in a squirrel population produces organisms with eight legs rather than four. Further, these mutant squirrels survive, successfully invade new habitats, and eventually give rise to a new species. The initial event, giving rise to extra legs, would be a good example of
#Question id: 4983
#Unit 11. Evolution and Behavior
As rat pups mature, the growth of their snouts and tails outpaces growth of the rest of their bodies, producing the appearance of sexually mature males. It is found that sexually mature female rats prefer to mate with mutant, sexually mature males that possess snouts and tails with juvenile proportions. Which of the following terms is (are) appropriately applied to this situation?
#Question id: 4982
#Unit 11. Evolution and Behavior
Bagworm moth caterpillars feed on evergreens and carry a silken case or bag around with them in which they eventually pupate. Adult female bagworm moths are larval in appearance; they lack the wings and other structures of the adult male and instead retain the appearance of a caterpillar even though they are sexually mature and can lay eggs within the bag. This is a good example of
#Question id: 4981
#Unit 11. Evolution and Behavior
An organism has a relatively large number of Hox genes in its genome. Which of the following is not true of this organism?
#Question id: 4980
#Unit 11. Evolution and Behavior
If an increase in dicynodont species diversity (i.e., number of species) occurred soon after the Permian extinction, and if it occurred for the same general reason usually given for the increase in mammalian diversity following the Cretaceous extinction, then it should be attributed to