Question

Root cap plays no role in the absorption of water in a plant, because
A. Its cell are loosely arranged
B. It has no root hairs
C. It has no connection with xylem tissue
D. Its cell are dead

Answer 1

Root cap is sheath of cells which protect the growing tip in plants. Root hair cells are adapted for absorption of water by increasing the surface area which further increases the absorption rate.

Complete answer:
First of all, you should know what a root cap is. Root cap is a terminal region of tap root and the root cap does not have root hair due to which they are unable to absorb water in plants or you can say they do not have any role in it. Instead of absorption of water, root cap functions to protect the growing tip in plants.
Absorption of water in a plant is done by root hair and root hair are unicellular extensions from the epidermis of root. Root hair increases the surface area for absorption of water and these root hair are not present in the root cap.

Let's look at options now, option A is Its cells are loosely arranged. The cells of the root cap are loosely arranged but this is not the reason that they do not play any role in the absorption but the reason behind it is that they do not have root hairs. Therefore, this option is incorrect and it gets eliminated.
Moving to option B which is It has no root hairs. This option is the correct option because there is absence of root hairs in the root cap due to which they do not play any role in absorption.
Moving to option C which is It has no connection with xylem tissue. This option is also incorrect because this is not the reason that they do not play any role in the absorption but the reason behind it is that they do not have root hairs. Therefore, this option is incorrect and it gets eliminated.
Last option D is: Its cells are dead. This option is also incorrect because this is not the reason that they do not play any role in the absorption but the reason behind it is that they do not have root hairs. Therefore, this option is incorrect and it gets eliminated.

Thus, the correct answer is option B i.e, It has no root hairs.

Note:
From all the given options, root hairs are responsible for absorption of water as these hair increases the surface area for absorption. Root hairs are not present in root caps due to which they do not play any role in absorption of water and this makes option B the correct one.