alleryRed tides in the sea are caused by rapid multiplication of:
ADinoflagellates (e.g. Gonyaulax — toxins may kill marine animals)
BSlime moulds
CCyanobacteria
DChrysophytes (diatoms)
Answer & Solution
Correct answer: A. Dinoflagellates (e.g. Gonyaulax — toxins may kill marine animals)
Red dinoflagellates like Gonyaulax can multiply explosively, causing 'red tides'.
The toxins they release in large numbers may kill fishes.
Dinoflagellates have stiff cellulose plates and two flagella (longitudinal + transverse).
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