AP BIOLOGY

Detailed explanation-1: -Roots grow in length only from their ends. The very tip of the root is covered by a thimble-shaped root cap, which serves to protect the growing tip as it makes its way through the soil. Just behind the root cap lies the apical meristem, a tissue of actively dividing cells.

Detailed explanation-2: -The apical meristem is the growth tissue. The rootcap covers the apical meristem. The epidermis is the ‘skin’ of the root and produces extension called root hairs. The root hairs are extensions of epidermal cells and they look like tiny hairs.

Detailed explanation-3: -The root cap (RC) is a multilayered dome of spindle-shaped parenchyma cells that overlies the growing root tip. It is present in the roots of almost all crop species.

Detailed explanation-4: -The root apical meristem (RAM) is the region within the root tip from which all primary root tissues and the root cap are derived.

Detailed explanation-5: -living parenchyma cells called the root cap. As the cells of the root cap are destroyed and sloughed off, new parenchyma cells are added by a special internal layer of meristematic cells called the calyptrogen.