Question

which statement about the giraffes explains their evolution based on charles darwins 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.

Explanation:

To solve this, we analyze each option using Darwin's theory of natural selection (variation, heritability, differential reproduction):

• First option: Fossil ancestor neck length isn’t a core Darwinian point here.
• Second option: Darwin’s theory emphasizes environmental influence on reproduction (not equal chance regardless of environment).
• Third option: This is Lamarck’s theory (acquired traits), not Darwin’s (Darwin focused on inherited variations).
• Fourth option: Darwin proposed that random genetic variations (like long necks) that aid survival/reproduction become more common over time (natural selection).

Answer:

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