Question

In lower plants, exchange of gases occurs by

• A. Diffusion through the body surface.
• B. Respiration.
• C. Photosynthesis.
• D. Combustion.

Answer 1

The correct option is A Diffusion through the body surface.

In lower plants (and also protozoans), exchange of gases takes place through the general body surface as they are not highly modified or specialised. Also, the body surface allows the diffusion of gases. In higher plants, the exchange of gases takes place through stomata.

Therefore, the correct answer is option A.