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Question
The contractile vacuole in protozoans are
The contractile vacuole in protozoans are
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Solution
The correct option is B Analogous to kidney of man
Contractile vacuoles are organelles in the cells of sponges and freshwater protozoans. In the freshwater Amoeba proteus, for example, the bubble-like contractile vacuole swells with excess fluid from the cytoplasm. It's membrane then pumps ions back into the cytoplasm, leaving mainly water in the vacuole. Kidneys are vertebrate osmoregulatory organs in which blood pressure forces fluid to filter through the walls of blood capillaries into tubules that process the filtrate into urine. Hence, contractile vacuole and kidney serve the same function of osmoregulation.Thus, the correct answer is option B.
Contractile vacuoles are organelles in the cells of sponges and freshwater protozoans. In the freshwater Amoeba proteus, for example, the bubble-like contractile vacuole swells with excess fluid from the cytoplasm. It's membrane then pumps ions back into the cytoplasm, leaving mainly water in the vacuole. Kidneys are vertebrate osmoregulatory organs in which blood pressure forces fluid to filter through the walls of blood capillaries into tubules that process the filtrate into urine. Hence, contractile vacuole and kidney serve the same function of osmoregulation.
Thus, the correct answer is option B.
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