Why can deciding evolutionary relationships only by external similarity be wrong?
Answer and explanation
Correct answer: Analogous organs may appear similar in function while having different origins
External resemblance alone is not reliable evidence of close evolutionary relationship because unrelated groups can develop similar features when they face similar environmental demands. These are analogous similarities, produced by convergent evolution. Scientists therefore also compare internal anatomy, embryology, fossils and molecular evidence. Option A is correct because similar outward function may hide different origins. B and C are plainly false, while D wrongly treats every resemblance as proof of common ancestry.
Frequently asked questions
What is the correct answer to this question?
Analogous organs may appear similar in function while having different origins
Why is this the correct answer?
External resemblance alone is not reliable evidence of close evolutionary relationship because unrelated groups can develop similar features when they face similar environmental demands. These are analogous similarities, produced by convergent evolution. Scientists therefore also compare internal anatomy, embryology, fossils and molecular evidence. Option A is correct because similar outward function may hide different origins. B and C are plainly false, while D wrongly treats every resemblance as proof of common ancestry.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Heredity and Evolution.
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