Question

Name the following:

Permanently open structures seen on the bark of an old woody stem.

Answer 1

Bark:

1. The wood formed due to secondary growth is called bark.
2. It is the outermost layer of wood of older roots and stems.

Lenticels:

1. These are special openings in the older stems in place of stomata.
2. These are found on the bark of the old stems.
3. These are permanently open for gaseous exchange and transpiration.
4. They have cells with large inter-cellular spaces.