NEET BIOLOGY

PLANT PHYSIOLOGY

TRANSPORT IN PLANT

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The cell sap of a root hair has a higher concentration of nitrate ions than the surrounding soil. Which feature of the cell maintains the higher concentration of these ions in the cell sap?
A
cell membrane
B
cell wall
C
large surface area
D
large vacuole
Explanation: 

Detailed explanation-1: -If the cell sap of root hair contains high concentration of ions then more water will enter the root cells by osmosis. This is because due to greater amount of ion the root cells become hypertonic with respect to the surrounding.

Detailed explanation-2: -The cell sap of root hair cells have ions and hence are at a concentration than the surrounding soil water.

Detailed explanation-3: -Root hair cells They absorb mineral ions by active transport, against the concentration gradient. Root hair cells are adapted for taking up water and mineral ions by having a large surface area to increase the rate of absorption.

Detailed explanation-4: -Endosmosis: It is a type of osmosis, in which water enters the cell from the surrounding. Here, endosmosis is seen as water enters the root hairs from the soil. This feature helps in the absorption of water in plants through roots.

Detailed explanation-5: -Potassium ions having high concentration in cell sap.

There is 1 question to complete.