An aquatic microbe that can grow only near the surface of the water is probably which of the following?
A) a phototroph
B) a heterotroph
C) a chemotroph
D) a lithotroph
E) an anaerobe

Question

Quizplus · Accepted Answer

A microbe that can grow only near the surface of the water is likely to be a phototroph, as it needs sunlight for photosynthesis. Heterotrophs can grow at various depths as they obtain their energy from organic matter. Chemotrophs obtain their energy from chemicals and do not require sunlight, but they can grow at various depths. Lithotrophs obtain their energy from inorganic compounds and can also grow at various depths. Anaerobes do not require oxygen, but their depth preference depends on their source of energy.

An Aquatic Microbe That Can Grow Only near the Surface