Question

Which statement about the giraffes explains their evolution based on Charles Darwin’s main points? The closest fossil ancestor to these giraffes would have a very short neck. All three of the giraffes have an equal chance of reproducing regardless of the environment. As a giraffe reached for food, the giraffe could make its neck longer making it better adapted to the environment. Long necks were a random genetic change and resulted in the gradual increase of organisms with long necks.

Answer 1

Long necks were a random genetic change and resulted in the gradual increase of organisms with long necks.

Explanation:

• According to Darwin, evolution occurred because natural selection allowed the organisms with higher reproductive and survival fitness to survive and eliminated the weaker organisms. As a result  the population of the fittest organisms increases and their trait got established.

• According to Darwin, the giraffes with long necks and giraffes with short neck once survived together in an environment but gradually the natural selection eliminated the giraffes with short neck and favored the growth of giraffes with long necks. Hence, at a point of time the short necked population got extinct and long necked population thrived to establish itself.