AP BIOLOGY

Detailed explanation-1: -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-2: -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. The growth of shoots and roots during primary growth enables plants to continuously seek water (roots) or sunlight (shoots).

Detailed explanation-3: -(B) Apical meristems and intercalary meristem are primary meristems.

Detailed explanation-4: -Primary growth involves the root apical meristem, primary meristems, and primary tissues.

Detailed explanation-5: -The apical meristem is a group of cells that retain the ability to continue divisions, forming new cells continuously as the plant grows. This PRIMARY growth is responsible for growth in height.