Cork Cambium

Q.

During secondary growth, periderm is produced by the activity of phellogen.

1. True
2. False

Q.

The waxy substance associated with the wall of cork cells is:

1. Cutin

2. Lignin

3. Hemicellulose

4. Suberin

Q. In barley stem, vascular bundles are

1. open and scattered
2. closed and scattered
3. closed and radial
4. open and in a ring

Q.

In a plant organ covered by periderm or the cork cambium, the stomata are absent. Gaseous exchange occurs through

1. Aerenchyma

2. Lenticels

3. Trichomes

4. Pneumatophores