What is the correct reason for considering the human arm and bat wing homologous?
Answer and explanation
Correct answer: Their basic bone plan is similar, although their functions differ
Homologous organs are identified mainly by similarity in basic structural plan and evolutionary origin, not by identical function. The human arm is used for grasping, while a bat wing is used for flight, yet both contain corresponding bones such as the upper arm, forearm and hand elements. This structural relationship suggests common ancestry, so option A is correct. Option B describes neither their actual functions nor homology; C is factually false; D describes analogous similarity incorrectly.
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What is the correct answer to this question?
Their basic bone plan is similar, although their functions differ
Why is this the correct answer?
Homologous organs are identified mainly by similarity in basic structural plan and evolutionary origin, not by identical function. The human arm is used for grasping, while a bat wing is used for flight, yet both contain corresponding bones such as the upper arm, forearm and hand elements. This structural relationship suggests common ancestry, so option A is correct. Option B describes neither their actual functions nor homology; C is factually false; D describes analogous similarity incorrectly.
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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