Question

Assertion (A): Lamarck’s theory of inheritance of acquired characters is mainly based on “survival of the fittest”. 

Reason (R): Lamarck has explained his principle of ‘use and disuse’ with the example of Giraffe’s neck.

1. A is True and R is False.
2. A is False and R is True.
3. Both A and R are True.
4. Both A and R are False.

Options

• (1)

• (2)

• (3)

• (4)

Answer 1

(2)

Explanation:

Lamarck’s theory of inheritance of acquired characters is not based on “survival of the fittest.” The idea of survival of the fittest is associated with Darwin’s theory of natural selection. Therefore, the Assertion (A) is false.

Lamarck explained his principle of use and disuse with the example of the giraffe’s neck, stating that repeated stretching of the neck gradually elongated it over generations. Therefore, the Reason (R) is true.

Hence, A is false and R is true.