Question

Diagram of a root-tip is given, wherein some parts are indicated by alphabets. Identify the option in which the parts are correctly matched.

• A. Region of secondary growth, Region of maturation, Region of elongation, Region of cell division, Root cap
• B. Region of elongation, Region of maturation, Region of cell division, Root hair, Root cap
• C. Region of maturation, Region of elongation, Region of cell division, Root hair, Root cap
• D. Region of maturation, Region of elongation, Region of cell division, Rhizoids, Root pocket

Answer 1

The correct option is C

Region of maturation, Region of elongation, Region of cell division, Root hair, Root cap

The root is covered at the apex by a thimble-like structure called the root cap (e). It protects the tender apex of the root as it makes its way through the soil.
Above the root cap is the region of meristematic activity (c). The cells of this region are very small, thin-walled and with dense protoplasm. They divide repeatedly.
The cells proximal to this region undergo rapid elongation and enlargement and are responsible for the growth of the root in length. This region is called the region of elongation (b).
The cells of the elongation zone gradually differentiate and mature. Hence, this zone, proximal to region of elongation, is called the region of maturation (a). From this region some of the epidermal cells form very fine and delicate, thread-like structures called root hairs (d).