AP BIOLOGY

Detailed explanation-1: -Lateral Meristems are observed in stems and roots of the plant body. Lateral meristem stimulates the increase in the girth of stem and root. It increases the lateral thickness of the plant stem and root. Hence, lateral meristem helps in increasing the girth.

Detailed explanation-2: -apical meristem, region of cells capable of division and growth in the root and shoot tips in plants. Apical meristems give rise to the primary plant body and are responsible for the extension of the roots and shoots.

Detailed explanation-3: -Apical meristem is present at the growing tips of stems and roots and increases the length of the stems and the roots. The girth (width) of the stem or root increases due to lateral meristem(cambium). Intercalary meristem is present at the base of the leaves or internodes (between two nodes) on twigs.

Detailed explanation-4: -The primary function of an intercalary meristem is to facilitate longitudinal growth of a plant organ, independent of activity of the apical meristem. Examples are the meristems in the leaf sheaths and internodes of grasses and horsetails.