The first chemicals that provided potential energy on Earth may have been formaldehyde and hydrogen cyanide. While these were produced by sunlight-driven reactions, they also occurred around deep-sea vents. If the first organisms on Earth evolved around these vents, the first life on Earth was ________.

Question

Quizplus · Accepted Answer

If the first organisms on Earth evolved around deep-sea vents where formaldehyde and hydrogen cyanide were produced, it is likely that they utilized chemosynthesis to obtain energy from these chemicals rather than photosynthesis, herbivory or carnivory. Therefore, option B is the best answer.

The First Chemicals That Provided Potential Energy on Earth May