Question

choose the best answers. some — perform chemosynthesis to form the bottom of a food chain in deep ocean trenches. a. archaebacteria b. bacteria c. protists d. cyanobacteria

Explanation:

In deep - ocean trenches, some archaebacteria (also known as archaea) can perform chemosynthesis. Chemosynthesis is a process by which organisms use chemical energy to produce organic compounds instead of sunlight (as in photosynthesis). These archaebacteria form the base of the food chain in these environments where sunlight is scarce. Bacteria, protists, and cyanobacteria are not the main organisms performing chemosynthesis to form the bottom of the food chain in deep - ocean trenches.

Answer:

A. archaebacteria