Question

Lamarck's proposal of the inheritance of acquired characteristics included the idea that

a. species are fixed and unchanging over time.
b. organisms are acted on by the environment.
c. local catastrophes cause mass extinctions of species.
d. the continual stretching of giraffe's necks to reach leaves led to longer necks.

Answer 1

The answer is d. the continual stretching of giraffe's necks to reach leaves led to longer necks.

Step-by-step explanation:

This statement was one of the main ideas of Lamarck's proposal inheritance. He thought that as giraffes needed to elongate their necks in order to reach the higher parts of the trees, then, the necks actually elongated. So the need was prior to the mutation. We now know that mutations happen before the change in the whole population.