A field biologist finds what might be a new species of prokaryote in sewage sludge. It is an obligate anaerobe that metabolizes organic acids and requires hydrogen gas. It lacks a peptidoglycan cell wall. The new find may be a
A) clostridium.
B) mycoplasma.
C) bacteroides.
D) methanogen.
E) cyanobacterium.

Question

Quizplus · Accepted Answer

Methanogens are obligate anaerobes that metabolize organic compounds and require hydrogen gas. They lack a peptidoglycan cell wall, which fits the description of the new prokaryote found.

A Field Biologist Finds What Might Be a New Species