According to the theory of natural selection, what will most likely happen to a species that exhibits variation in physical traits? a) the species will separate into many different species. b) the species will be more likely to be able to survive changes units environment. c) individuals that have different traits as the result of mutations will develop diseases more easily. d) individuals with more common traits will not survive as well as individuals with less common traits.

According to natural selection, the D) individuals with more common traits will not survive as well as individuals with less common traits. This can be explained using an example of the giraffes. The giraffes had a variation in the length of the necks. As the small shrubs vanished from the dessert environment, the giraffes had to eat leaves from the taller trees present there. The shorter neck giraffes found it difficult to obtain the leaves, while the longer neck giraffes benefited from the reduced competition. Thus, the longer neck trait got selected more often in the population.

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