Root hair have their origin from
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Correct Answer: Option D
Explanation:
Root hairs originate from the epidermis of the root. Specifically, they develop from the outermost layer of cells (epidermal cells) in the root, and their main function is to increase the surface area for water and nutrient absorption.
Here’s why the other options are incorrect:
A. Endodermis – The endodermis is a layer of cells that regulates water and nutrient flow into the vascular tissues of the root, but it does not give rise to root hairs.
B. Pericycle – The pericycle is a layer of cells from which lateral roots can arise, but not root hairs.
C. Cortex – The cortex is the region between the epidermis and the vascular tissue, and while it contains storage cells, it does not give rise to root hairs.
E. Xylem – The xylem is responsible for the transport of water and nutrients, not for the formation of root hairs.
Root hairs originate from the epidermis of the root. Specifically, they develop from the outermost layer of cells (epidermal cells) in the root, and their main function is to increase the surface area for water and nutrient absorption.
Here’s why the other options are incorrect:
A. Endodermis – The endodermis is a layer of cells that regulates water and nutrient flow into the vascular tissues of the root, but it does not give rise to root hairs.
B. Pericycle – The pericycle is a layer of cells from which lateral roots can arise, but not root hairs.
C. Cortex – The cortex is the region between the epidermis and the vascular tissue, and while it contains storage cells, it does not give rise to root hairs.
E. Xylem – The xylem is responsible for the transport of water and nutrients, not for the formation of root hairs.