Q.

Root cap is derived from –

A. Derm atogen
B. Calyptrogen
C. Protoderm
D. Histogen
Answer» B. Calyptrogen
Explanation: Calyptrogen is a layer of rapidly dividing cells at the tip of a plant root, from which the root cap is formed. It occurs in grasses and many other plants. The root cap is formed by several layers of cells that envelop the root tip externally. This covering of cells, of which the outermost ones are dead, envelops and protects the growing tip very much as a thimble protects the finger.
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