Chemical reactions involving ________ have been proposed as energy-yielding reactions for the earliest organisms on Earth.
A) Fe, O₂, and H₂
B) S, O₂, and H₂
C) S, and O₂
D) S, and H₂

Question

Quizplus · Accepted Answer

Chemical reactions involving sulfur (S) and hydrogen (H₂) have been proposed as energy-yielding reactions for the earliest organisms on Earth, as these elements were abundant and could have facilitated the necessary chemical processes for life in the absence of oxygen.

Chemical Reactions Involving ________ Have Been Proposed as Energy-Yielding Reactions