Freshwater proteroants pumped out excess water by a special structure called:
Correct answer: B. Contractive vacuole
- A. Oral groove
- B. Contractive vacuole
- C. Vesicle
- D. Vacuole
Explanation
Freshwater protozoans or Protoctista pump excess water out of their body with the help of contractile vacuole because they do not have an osmoregulatory mechanism like human beings.
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