Question

Red tides in oceans occurs due to presence and rapid growth of

• A. Diatoms
• B. Dinoflagellates
• C. Euglenoids
• D. Slime moulds

Answer 1

The correct option is B Dinoflagellates

Red tides in oceans occur due to the presence of rapid growth of dinoflagellates which are usually considered as reddish brown algae and characterized by the presence of pigment peridinin that imparts red-brown color. Great population explosions of dinoflagellates make the water turn reddish and is referred to as red tides which are poisonous and destructive for living organisms due to the production of toxins produced by dinoflagellates.

So, the correct answer is option B.