What do homologous organs indicate about evolution?
Answer and explanation
Correct answer: Possibility of common ancestry
Homologous organs have the same basic structural plan because they were inherited from a common ancestral stock, although their functions may have become different in different organisms. For example, the forelimbs of humans, whales and bats contain corresponding bones but serve different purposes. This pattern is evidence of divergent evolution and possible common ancestry. Therefore A is correct, while D describes function alone and is incomplete.
Frequently asked questions
What is the correct answer to this question?
Possibility of common ancestry
Why is this the correct answer?
Homologous organs have the same basic structural plan because they were inherited from a common ancestral stock, although their functions may have become different in different organisms. For example, the forelimbs of humans, whales and bats contain corresponding bones but serve different purposes. This pattern is evidence of divergent evolution and possible common ancestry. Therefore A is correct, while D describes function alone and is incomplete.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Heredity and Evolution. Topic: Evolution and speciation.
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