Single-celled organisms that often cause recurrent diseases are called
A)viruses.
B)parasites.
C)protozoa.
D)bacteria.

Question

Quizplus · Accepted Answer

Single-celled organisms that often cause recurrent diseases are called protozoa. Viruses and bacteria are also single-celled organisms, but they do not typically cause recurrent diseases. Parasites can be single-celled or multicellular, but not all parasites cause recurrent diseases.

Single-Celled Organisms That Often Cause Recurrent Diseases Are Called