Which of the following characterizes an animal that does not have a circulatory system?
A) Long diffusion distance
B) Single-celled body
C) Inhabits dry, terrestrial environment
D) Large, rounded, multicellular body
E) High levels of activity

Question

Quizplus · Accepted Answer

Animals without a circulatory system are single-celled organisms, such as protists, which rely on diffusion to transport materials in and out of their cells.

Which of the Following Characterizes an Animal That Does Not