AP BIOLOGY

Detailed explanation-1: -The apical meristem is found at the ends of roots (root apical meristem) or the tops of shoots (shoot apical meristem) of a plant, and is responsible for the plant’s growth in length or height. This type of growth is known as primary growth.

Detailed explanation-2: -Primary growth is the increase in the length of root and shoot. It is the result of cell division of apical meristem. So, the correct option is ‘Primary growth’.

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

Detailed explanation-4: -apical meristem, region of cells capable of division and growth in the root and shoot tips in plants.

Detailed explanation-5: -The length of the plant is increased by the primary meristems present from the early life of the plant.