AP BIOLOGY

Detailed explanation-1: -Most primary growth occurs at the apices, or tips, of stems and roots. Primary growth is a result of rapidly-dividing cells in the apical meristems at the shoot tip and root tip. Subsequent cell elongation also contributes to primary growth.

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: -The lengthening of the stem by apical meristem division is called primary growth. The three types of primary tissues are: protoderm. ground meristem. procambium.

Detailed explanation-4: -Primary growth is controlled by root apical meristems or shoot apical meristems, while secondary growth is controlled by the two lateral meristems, called the vascular cambium and the cork cambium.

Detailed explanation-5: -Primary growth occurs at the apical meristem (a meristem located at the tip of a stem). A meristem is a region of undifferentiated cells from which new cells arise through cellular division. Secondary growth is an increase in thickness or girth of the plant body due to activity of lateral meristems.