Question

Excretion in Amoeba occurs through the

• A. Lobopodia.
• B. Contractile vacuole.
• C. Uroid portion.
• D. Limiting membrane.

Answer 1

Answer: (B)

Amoeba is an unicellular organism also known as amoeboid, which has the capacity to modify its body by expanding and revoking pseudopods. It is unicellular and can be seen in fresh water. This single cell performs overall function of the body such as collects the food, oxidizes it, supplies energy, excretes waste products and helps in the reproduction. Carbon dioxide and ammonia are the main waste products of amoeba and they are excreted out through the body by the process called diffusion with the help of contractile vacuole. The waste formed in the cytoplasm of amoeba gets in to the contractile vacuole. Then the contractile vacuole enlarges and moves to the periphery of plasma membrane and finally it bursts out. Thus the discharge of waste products directly in to the sea.

So, the correct answer is option C.