Question

Exchange of gases takes place in roots through ___.

Answer 1

Gaseous exchange in plants

1. The exchange of respiratory gases in plants takes place by diffusion.
2. Carbon dioxide is taken in to be utilized in the photosynthesis process and the oxygen produced is expelled out.

Exchange of gases in roots

1. The roots are the parts fixed in the soil.
2. The fine air spaces between the soil particles have oxygen.
3. The oxygen is taken up by the root hair through diffusion.
4. Root hair is the simple root extension that does not have a cuticle
5. So oxygen diffuses in the root hair and reaches the epidermal cell of the roots.
6. Carbon dioxide from roots moves to the air spaces present in the soil through the root hair.

Exchange of gases takes place in roots through root hair.