13. Which one of the following statements related to evolution is NOT correct ? (a) Homologous organs bear the evidence of divergent evolution. (b) Wings of insects and wings of bats are examples of homologous organs. (c) Muscle of external ear in humans is an example of vestigial organ. (d) Analogous organs bear the evidence of convergent evolution.
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Answer:
d analogous organs bear the evidence of convergent evolution
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(d) Analogous organs bear the evidence of convergent evolution is not correct is the correct answer
Explanation:
Homologous organs bear the evidence of divergent evolution:
- Homologous structures are structures that indicate a species is diverging from its ancestor in divergent evolution. These structures do not have to serve the same purpose as those of the species' forefathers.
- Human and bat forelimbs, for example, are both homologous structures.
Wings of insects and wings of bats are examples of homologous organs:
- It's not always evident whether structural similarities between species are analogous or homologous. The wings of bats and birds are an illustration of this.
- These structures are similar in that they are both modifications of early reptiles' forelimb bone structure.
Muscle of external ear in humans is an example of vestigial organ:
- Small, weak muscles surround the human ear, which formerly allowed evolutionary ancestors to pivot their ears back and forth. The muscles are no longer capable of much movement, yet their reflex action still exists.
- These muscles are vestigial, which means they're evolutionary leftovers that previously served a purpose but no longer do.
Analogous organs bear the evidence of convergent evolution:
- Convergent evolution produces homologous structures with similar form and function that did not exist in the last common ancestor of those groups.
- Although the wings of birds, bats, and pterosaurs are similar, their forelimbs are homologous, sharing an original condition but performing different tasks.
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