Question

Give appropriate biological/ technical terms for the following-

The lens-shaped openings on the surface of the old stem.

Answer 1

1. The surface of old woody trees or stems is porous comprising of cells with large intracellular spaces between them. These openings are called lenticels. The lens-shaped openings on the surface of the old stem are lenticels.
2. Lenticels help in the exchange of gases and water vapor.