Question

In an aquatic ecosystem,a student observed that the lowest tier of the biomass,pyramid was much narrower than the rest.The main producers of this ecosystem most likely are:

• A. Singles-celled protists
• B. aquatic plants
• C. grasses
• D. all the above.

Answer 1

The correct option is A Singles-celled protists

The cells of protists are highly organized with a nucleus and specialized cellular machinery called organelles. At one time, simple organisms such as amoebas and single-celled algae. The main produce of the aquatic ecosystem is single-celled protists.

So, the correct option is 'Single-celled protists'.