Why are organisms that presently use hydrogen sulfide as an electron source limited in their distribution and importance?
A)It is more efficient.
B)They are smaller.
C)Hydrogen sulfide is abundant and widespread.
D)Hydrogen sulfide is neither abundant nor widespread.
E)In the current environment, hydrogen sulfide combines with silicon dioxide, inactivating it.

Question

Quizplus · Accepted Answer

Hydrogen sulfide is neither abundant nor widespread, which limits the distribution and importance of organisms that use it as an electron source. This is in contrast to other electron sources, such as oxygen, which is abundant and widespread, allowing for a wide distribution and importance of organisms that use it.

Why Are Organisms That Presently Use Hydrogen Sulfide as an Electron