Why can human hand and forelimb of horse be considered homologous organs?
Answer and explanation
Correct answer: Because their basic bone plan is similar but their functions differ
Homologous organs have a similar basic structural plan because of common ancestry, although they may perform different functions. The human hand is adapted for grasping and the horse forelimb for support and locomotion. Their corresponding bones, such as the upper arm, forearm and hand-region bones, reveal the shared plan. Therefore option A is correct; the other choices confuse function, appearance or digestion with structural homology.
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What is the correct answer to this question?
Because their basic bone plan is similar but their functions differ
Why is this the correct answer?
Homologous organs have a similar basic structural plan because of common ancestry, although they may perform different functions. The human hand is adapted for grasping and the horse forelimb for support and locomotion. Their corresponding bones, such as the upper arm, forearm and hand-region bones, reveal the shared plan. Therefore option A is correct; the other choices confuse function, appearance or digestion with structural homology.
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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