. The upper forelimbs of humans and bats have fairly similarskeletal structures, whereas the corresponding bones inwhales have very different shapes and proportions. However,genetic data suggest that all three kinds of organisms divergedfrom a common ancestor at about the same time. Which ofthe following is the most likely explanation for these data?(A) Forelimb evolution was adaptive in people and bats, butnot in whales.(B) Natural selection in an aquatic environment resulted insignificant changes to whale forelimb anatomy.(C) Genes mutate faster in whales than in humans or bats.(D) Whales are not properly classified as mammals.
. The upper forelimbs of humans and bats have fairly similarskeletal structures, whereas the corresponding bones inwhales have very different shapes and proportions. However,genetic data suggest that all three kinds of organisms divergedfrom a common ancestor at about the same time. Which ofthe following is the most likely explanation for these data?(A) Forelimb evolution was adaptive in people and bats, butnot in whales.(B) Natural selection in an aquatic environment resulted insignificant changes to whale forelimb anatomy.(C) Genes mutate faster in whales than in humans or bats.(D) Whales are not properly classified as mammals.
Biology Today and Tomorrow without Physiology (MindTap Course List)
5th Edition
ISBN:9781305117396
Author:Cecie Starr, Christine Evers, Lisa Starr
Publisher:Cecie Starr, Christine Evers, Lisa Starr
Chapter12: Processes Of Evolution
Section: Chapter Questions
Problem 4CT
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Question
. The upper forelimbs of humans and bats have fairly similar
skeletal structures, whereas the corresponding bones in
whales have very different shapes and proportions. However,
genetic data suggest that all three kinds of organisms diverged
from a common ancestor at about the same time. Which of
the following is the most likely explanation for these data?
(A) Forelimb evolution was adaptive in people and bats, but
not in whales.
(B) Natural selection in an aquatic environment resulted in
significant changes to whale forelimb anatomy.
(C) Genes mutate faster in whales than in humans or bats.
(D) Whales are not properly classified as mammals.
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