Why are the human arm and whale forelimb considered homologous?
Answer and explanation
Correct answer: Because their basic bone structure is similar
The human arm and whale forelimb perform different functions: one is adapted mainly for manipulation and the other for swimming. Nevertheless, both show a corresponding arrangement of bones, including the upper-arm bone, forearm bones and wrist and digit elements. This shared basic structural plan indicates inheritance from a common ancestor, so they are homologous organs. Option A is correct; similarity of function is not required.
Frequently asked questions
What is the correct answer to this question?
Because their basic bone structure is similar
Why is this the correct answer?
The human arm and whale forelimb perform different functions: one is adapted mainly for manipulation and the other for swimming. Nevertheless, both show a corresponding arrangement of bones, including the upper-arm bone, forearm bones and wrist and digit elements. This shared basic structural plan indicates inheritance from a common ancestor, so they are homologous organs. Option A is correct; similarity of function is not required.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Metals and Non-metals. Topic: Corrosion and extraction basics.
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