Question

In plants, exchange of gases occurs across the surface of

• A. Roots and Stems only
• B. Stems and Leaves only
• C. Leaves only
• D. Stems, Leaves and Roots

Answer 1

The correct option is D Stems, Leaves and Roots

In roots, stems & leaves the exchange of gases takes place through diffusion. The surface of young stem have stomata , while that of an older stem have lenticel for gaseous exchange. Stomata are mainly present on the surface of leaves apart from the epidermal surface of young stem for gaseous exchange. In root exchange of gases occurs through root hair.