Question

Explain the way how the plants absorb water from soil

Answer 1

They absorb it through the process of osmosis.

Now, osmosis is defined as the movement of water molecules from the region of their higher concentration to the region of their lower concentration through a semi-permeable membrane.

The plant root cells act as the semi permeable membrane and they allow water molecules to move from their higher concentration i.e. from the soil to their lower concentration i.e. to the plant roots. And thus, the water is entered.

Hope it helps...

Answer 2

NCERT based Answer for Class 11 Biology Students

How do plants absorb water?

 Absorption of water and minerals occur mainly through root hairs.

 Root hairs are thin walled slender extensions of root epidermal cells that greatly increase surface area for absorption.

 Absorption of water by root hairs occurs purely by osmosis.

 Once water is absorbed by root hairs, it can move deeper into root layers by two pathways:

1. Apoplast pathway:

 Apoplast is the system of adjacent cell walls that is continuous throughout the plant, except at Casparian strips of endodermis in the roots.

 Apoplastic movement of water occurs through intercellular spaces and cell walls.

Note: Apoplastic pathway does not involve crossing the cell membrane.

 This movement is dependent on gradient.

 As water evaporates into intercellular spaces or atmosphere, tension develops in stream of water in the apoplast. As a result, mass flow of water occurs due to adhesive and cohesive properties of water.  

2. Symplast pathway:

 Symplast is the system of interconnected protoplasts through plasmodesmata.

 During symplastic movement, water crosses cell membrane and travels through cytoplasm; aided by cytoplasmic streaming.

 Intercellular movement occurs through plasmodesmata.

 As water has to enter the cells through cell membrane, hence movement is relatively slower.

Note:

 Most of the water flow in roots occurs via apoplast since cortical cells are loosely packed and offer no resistance to water movement.

 Casparian ring of endodermis is impervious to water, thus symplastic pathway is the only way to cross it and reach the cells of xylem.

 Water movement through apoplast and symplast is down a potential gradient.  

If you find the answer useful, plz mark it the Brainliest.

Visit our website for purchasing XI & XII Complete Syllabus Video Lectures

https://concept-tutorials.teachable.com