NTA Abhyas NEET2020BotanyMorphology of Flowering PlantsPractice
Arrange the different parts of the root vertically, from the top to the bottom.
Options
- ARegion of elongation → Root hair → Region of maturation → Region of meristematic activity → Root cap
- BRegion of maturation → Root hair → Region of elongation → Region of meristematic activity → Root cap
- CRegion of maturation → Region of elongation → Region of meristematic activity → Root cap → Root hair
- DRoot cap → Region of meristematic activity → Region of elongation → Root hair → Region of maturation
Correct answer
B. Region of maturation → Root hair → Region of elongation → Region of meristematic activity → Root cap
Step-by-step solution
The root is covered at the apex by a thimble-like structure called the root cap. It protects the tender apex of the root as it makes its way through the soil. A few millimetres above the root cap is the region of meristematic activity. 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.