Question

Phototrophs and chemotrophs are defined based on their

• A. Energy source
• B. Requirement of organic and inorganic substance
• C. Metabolism
• D. Structure

Answer 1

The correct option is A Energy source

Phototrophs : The energy source of phototrophs is mainly sunlight.

Chemotrophs : The energy source of chemotrophs is the oxidation energy of chemical compounds.

$\therefore$ Phototrophs and chemotrophs are defined based on their energy source.