alleryWhich part of Lamarck's theory was rejected after repeated verification?
AThat organs degenerate when not used at all
BThat activity can develop an organ
CThat acquired characters are passed to offspring
DThat organisms change during their lifespan
Answer & Solution
Correct answer: C. That acquired characters are passed to offspring
1. Lamarck claimed organs develop with use and shrink with disuse.
2. He also claimed such acquired changes pass to the offspring.
3. The use-or-disuse development of organs was widely accepted.
4. But the inheritance of acquired characters was tested many times.
5. It was found that changes acquired during life are not transmitted to offspring.
6. Hence the inheritance-of-acquired-characters part was rejected.
7. Trap (degeneration by disuse): this observation was accepted, not rejected.
8. Trap (development by activity): this too was accepted as observed.
9. Trap (change during lifespan): organisms do change in life; that part was not the rejected claim.
_Source: Balbharati (Maharashtra Board) Class 10 Science & Technology Part 2, Ch 1 "Heredity and Evolution", p.17_
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