Photoautotrophs Reside in the ________ Zone(s) of Marine Environments

Question

Photoautotrophs reside in the ________ zone(s) of marine environments.
A) abyssal
B) limnetic
C) littoral
D) both limnetic and littoral
E) abyssal, limnetic and littoral

Accepted Answer

Photoautotrophs, such as algae and cyanobacteria, require sunlight to perform photosynthesis, so they are found in the limnetic and littoral zones of marine environments where sunlight penetrates. The abyssal zone is too deep for sunlight to reach, making it unsuitable for photoautotrophs.