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03-09-2019
Biology

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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. 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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TenishaTon TenishaTon

09-09-2019

Answer: Option B

Explanation:

The upper forelimbs of human beings and bats have similar skeletal structures but the same structure has resulted differently in whales.

This is because the natural selection in whales has resulted in change in anatomy and this change in whales has changed their anatomy.

The forelimbs of whales has changed into flippers and it helps whales in swimming.

The forelimbs of human beings, whales and bats have the common ancestors but because of different environment they evolved differently.

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