Question

which group of organisms forms the base of the energy pyramid in a pelagic marine ecosystem? select one: a. zooplankton b. phytoplankton c. bacteria d. sea grass

Explanation:

Phytoplankton are primary producers in pelagic marine ecosystems. They perform photosynthesis, converting sunlight into energy, and form the base of the energy pyramid by providing energy for higher - trophic level organisms.

Answer:

B. phytoplankton