Classify meristem based on position with a simplified diagram.

Explanation

1. Apical meriste : Present in apices of root and plant, it is called as primary growth.
2. Intercalary meristem : Occurs between the mature tissues. It responsible for elongation of internodes.
3. Lateral meritem : Occurs along the longitudinal axis of stem and root. It is reponsible for secondary tissues and thickening of stem and root. Example : vascular cambium and cork cambium.