52.Which of these are the chief 'producers’ in the ocean? A. Dinoflagellates B. Diatoms C. Euglena D. Gonyaulax
Option B Phytoplanktons are the producers in the ocean. Diatoms are a class of phytoplankton which are known as chief producers in the ocean. The food chain in a marine ecosystem depends on it. Thus, diatoms have left behind a large amount of cell wall deposits in their habitat; this accumulation over billions of years is referred to as ‘diatomaceous earth’. Being gritty this soil is used in polishing, filtration of oils and syrups.
