Question

Which is not a feature of dinoflagellates?

• A. They cause red tides
• B. Their cell wall has stiff cellulose plates on the outer surface
• C. They release toxins
• D. These are mostly fresh water and non-photosynthetic

Answer 1

The correct option is D These are mostly fresh water and non-photosynthetic

Dinoflagellates are mostly marine and photosynthetic in nature. The cell wall has stiff cellulose plates on the outer surface. Very often, red dinoflagellates (Example: Gonyaulax) undergo such rapid multiplication that they make the sea appear red. This phenomenon is known as a red tide. Toxins released by Gonyaulax large numbers may even kill other marine animals such as fishes.