The specialized structures of complex animals have evolved because
A) the environment imposes identical problems regardless of where the animals are found.
B) the development of the specialized structures in an animal is influenced by the animal's ability to learn.
C) the simplest animals are those with the most recent appearance among the biota.
D) they permit adjustments to a wide range of environmental changes.
E) the most complex animals are the ones with the most ancient evolutionary origin.

Question

Quizplus · Accepted Answer

Specialized structures in complex animals have evolved because they allow for adjustments to a wide range of environmental changes. This adaptability gives complex animals a survival advantage in their respective environments. Option A is incorrect because different environments may pose different problems to animals. Option B is incorrect because the development of specialized structures is primarily directed by the animal's genetic makeup and not solely by the ability to learn. Option C is incorrect because the complexity of animals is not necessarily directly related to their evolutionary appearance. Option E is incorrect because some of the most ancient animals are relatively simple in structure.

The Specialized Structures of Complex Animals Have Evolved Because