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 occur around deep- sea vents. If the first organisms on Earth evolved around these vents, the first life on Earth was

Question

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If the first organisms on Earth evolved around deep-sea vents where formaldehyde and hydrogen cyanide were being produced, they would have been chemosynthetic organisms obtaining energy from these chemicals rather than from sunlight or plants. Therefore, the best choice is C) chemosynthetic and obtained energy from chemicals.

The First Chemicals That Provided Potential Energy on Earth May