Kingdom Protista Features · NCERT Biology

Which group of protists is known for causing 'red tides' in the ocean, making the water appear red?

  1. Amoeboid protozoans
  2. Dinoflagellates
  3. Euglenoids
  4. Slime moulds
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Correct answer: Dinoflagellates

Red dinoflagellates such as Gonyaulax undergo rapid multiplication that makes the sea appear red. These organisms can also release toxins that are harmful to marine fish and other animals.

Difficulty: Medium Question 3 of 20

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