The roots that originate from the base of the stem are:

1. Primary roots

2. Prop roots

3. Lateral roots

4. Fibrous roots

Root hairs develop from the region of:

1. Elongation

2. Root cap

3. Meristematic activity

4. Maturation

In a longitudinal section of a root, starting from the tip upward, the four zones occur in the following order:
 

Pneumatophores are found in:
1. The vegetation is found in marshy and saline lake
2. The vegetation is found in saline soil
3. Xerophytes
4. Epiphytes