Question

10. Name the phenomenon which helps fresh water unicellular organisms (eg. Amoeba) continuously gain
water in their bodies. Also name the mechanism by which these organisms throw out excess of water from their bodies.​

Answer 1

The phenomenon that helps fresh water unicellular organism such as amoeba to continuously gain water in their bodies is due to osmosis. These organisms have contractile vacuoles to throw out excess of water from their bodies.

Answer 2

Answer:

1) Amoeba is a freshwater unicellular organism. It continuously gain water it body due to osmosis. It contains contractile vacuoles to throw out excess of water from its body.

2) a. Absorption of water by the plant root hairs occurs due to osmosis.

b. In plants, cells, tissues and soft organs such as leaves, buds, young shoots, flowers, fruits maintain turgidity due to osmotic absorption of water.

Explanation: