The first bacteria probably used ________ instead of water as a source of hydrogen.
A)H2SO4
B)HCl
C)H2S
D)OH-1
E)Fe3O4.OH

Question

Quizplus · Accepted Answer

It is believed that the first bacteria, which thrived in a chemosynthetic environment, used hydrogen sulfide (H2S) as a source of hydrogen rather than water. This is because H2S was abundant in the early Earth's atmosphere and oceans, while oxygen was scarce. Through chemosynthesis, these bacteria converted H2S into organic compounds, providing the foundation for the evolution of life on Earth.

The First Bacteria Probably Used ________ Instead of Water as a Source