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The organelle responsible for osmoregulation in Paramecium is

A. flame cell

B. nephridia

C. contractile vacuole

D. malpighian tubule

QUICK ANSWER…

C

DETAILS…  

Osmoregulation is the process of maintaining appropriate balance of fluid and salt concentration between internal and external environment of a cell. Paramecium uses osmoregulation to remove metabolic wastes.

Now for the right answer to the above question:

1. Flame cell is the excretory organ of a flatworm and not paramecium. so, A is quite incorrect.
2. Nephridia is the excretory organ of earthworms. B is also incorrect.
3. Contractile vacuole is a specialized organelle responsible for osmoregulation in one-celled organisms like paramecium, and amoeba. C is very correct.
4. D is incorrect; the malpighian tubule is the principal excretory organ of insects.

QUICK ADVICE…

You may please note that:

• Flatworms uses flame cells as well as nephridia to remove wastes.

Use the questions and answers session to raise further questions on this topic…

/ culled from 2017 JAMB-UTME biology question 6 /