Changes in the gene pool can occur due to various mechanisms. from 1892 to 1954, millions of individuals emigrated (moved out) from countries across the atlantic ocean to the united states. many of these individuals entered through ellis island, a federal immigration station in new york. which mechanism affected the gene pool of the immigrants that entered the united states through ellis island? a. genetic drift b. gene flow c. gene mutation d. natural selection

The upper forelimbs of humans and bats have fairly similar skeletal structures, whereas the correspondingbones in whales have very different shapes and proportions. however, genetic data suggest that all three kindsof organisms diverged from a common ancestor at about the same time. which of the following is the mostlikely explanation for these data? a) humans and bats evolved by natural selection, and whales evolved by lamarckian mechanisms. b) forelimb evolution was adaptive in people and bats, but not in whales. c) natural selection in an aquatic environment resulted in significant changes to whale forelimb anatomy. d) genes mutate faster in whales than in humans or bats. e) whales are not properly classified as mammals.