Topic: Monera, Protista and Fungi· Diversity in Living World

Which of the following organisms are known as chief producers in the oceans ?

1. Dinoflagellates

2. Cyanobacteria

3. Diatoms

4. Euglenoids

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Answer: 3. Diatoms

Key idea: Diatoms are the chief producers in the oceans.

These are abundant photosynthetic protists (golden-brown algae) forming a major part of phytoplankton. Dinoflagellates, cyanobacteria and euglenoids contribute less.

Answer: option 3.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

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Which of the following organisms are known as chief producers in the oceans ?

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