Question

question 4 of 10
which best describes a bacterium?
a. a type of virus
b. the shell surrounding a pilus
c. a unicellular prokaryote
d. a particle that attacks viruses

Explanation:

Bacteria are single - celled (unicellular) organisms. Prokaryotes are organisms without a nucleus and membrane - bound organelles, and bacteria fit this description. Viruses (A) are not cells. Option B is incorrect as it describes something related to a pill (unrelated to bacteria). Option D is wrong as bacteria are not particles that attack viruses.

Answer:

C. A unicellular prokaryote