When a scientist describes the "body plan" of a phylum, he or she is implying that ________.
A) organisms direct their own evolution in order to maximise their success
B) animals evolve according to a pre-ordained plan
C) the body shapes we see now have been more successful than others in the past
D) mutations have arisen that allow only some shapes to be produced

Question

Quizplus · Accepted Answer

The term "body plan" refers to the general structure, arrangement of organ systems, and integrated functioning of parts in an organism. It implies that certain body shapes have been naturally selected over time because they were more successful in the given environmental conditions.

When a Scientist Describes the "Body Plan" of a Phylum