GENETICS AND EVOLUTION
EVOLUTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Bats evolved from humans.
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Dogs evolved from humans.
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These organisms share a common ancestor.
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These organisms are classified as the same species.
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Detailed explanation-1: -Q. What can be inferred from observed similarities in the forelimbs of humans, dogs and bats? Dogs evolved from humans. These organisms are classified as the same species.
Detailed explanation-2: -Homologous structures are structures that are similar in related organisms because they were inherited from a common ancestor.
Detailed explanation-3: -Homologous structures are similar physical features in organisms that share a common ancestor, but the features serve completely different functions. An example of homologous structures are the limbs of humans, cats, whales, and bats.
Detailed explanation-4: -The homologous structures all have the same bones, humerus, raidus, ulna, carpals, meta carpals and phalanges. This suggests that all of the organisms had a common ancestor, even though a bat’s wing and human’s arm have different functions.
Detailed explanation-5: -DNA and the genetic code reflect the shared ancestry of life. DNA comparisons can show how related species are. Biogeography. The global distribution of organisms and the unique features of island species reflect evolution and geological change.