Question

Lamarckism cannot explain

• A. Webbed toes in aquatic birds
• B. Weak muscles in the son of a wrestler
• C. Long narrow and limbless body of snakes
• D. Both A and B

Answer 1

The correct option is B Weak muscles in the son of a wrestler

• Lamarck in his use and disuse theory proposed that any body part used vigorously caused it to become stronger and inherited in descendants. Lamarckism was failed to explain the reason behind the weak muscles of the wrestler’s son.
• Which was later on explained by August Weismann in his germplasm theory. The germplasm theory claimed that only those changes would be inherited that affects germplasm (now called DNA) and any change in the body would not affect germplasm, so could not be inherited.

Thus, the correct answer is ‘Weak muscles in the son of a wrestler.’