Most prokaryotes
A) are agents of disease.
B) lack ribosomes.
C) evolved from the most ancient eukaryotes.
D) lack a cell wall.
E) are chemoheterotrophs.

Question

Quizplus · Accepted Answer

The majority of prokaryotes are chemoheterotrophs, which means they obtain energy by breaking down organic molecules and obtain carbon from other organisms. This is in contrast to autotrophs, which can produce their own energy and carbon sources through photosynthesis or chemolithotrophy. Option A is incorrect because only a small fraction of prokaryotes are agents of disease, while many others are beneficial or neutral. Option B is incorrect because prokaryotes have ribosomes, although they may be smaller or simpler than those of eukaryotes. Option C is incorrect because eukaryotes and prokaryotes are believed to have evolved independently from separate ancestors. Option D is incorrect because many prokaryotes have cell walls, which provide structural support and protection.

Most Prokaryotes