The existence of evolutionary trends, such as increasing body sizes among horse species, is evidence that
A) a larger volume-to-surface area ratio is beneficial to all mammals.
B) an unseen guiding force is at work.
C) evolution always tends toward increased complexity or increased size.
D) in particular environments, similar adaptations can be beneficial in more than one species.
E) evolution generally progresses toward some predetermined goal.

Question

Quizplus · Accepted Answer

The trend of increasing body sizes among horse species suggests that similar adaptations can be beneficial in more than one species, especially in similar environments. This idea is in line with the concept of convergent evolution, where unrelated organisms evolve similar adaptations in response to similar environmental pressures.

The Existence of Evolutionary Trends, Such as Increasing Body Sizes