Assertion (A): Absorption of soil water by root is mostly an active process.
Reason (R): Most of the water is absorbed by the plants through osmotic mode that occurs due to concentration gradient and hence does not require metabolic energy

Both A & R are true and R explains A

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Both A & R are true and R does not explain A

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A is true and R is false

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A is false and R is true.

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Solution

The correct option is D
A is false and R is true.

Plants absorb soil water with the help of root system. Concentration of water is more in soil than roots and hence water enters into root through osmosis without the requirement of any metabolic energy.

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N a^{+}

and amino acids are absorbed actively. Reason:

N a^{+}

, glucose and amino acids move against the concentration gradient and hence require energy.

With respect to the given assertion and reason, choose the correct option.
Assertion (A): Water and minerals are absorbed from roots and are transported upwards to various parts of the plant.
Reason (R): The process by which a substance absorbed from the roots of the plant is moved to the upper part of the plant is known as active transport.

Q. Assertion :Plant roots absorb water from soil colloids. Reason: Hygroscopic water is held by soil colloids.

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Assertion (A): Absorption of soil water by root is mostly an active process. Reason (R): Most of the water is absorbed by the plants through osmotic mode that occurs due to concentration gradient and hence does not require metabolic energy

The correct option is D A is false and R is true. Plants absorb soil water with the help of root system. Concentration of water is more in soil than roots and hence water enters into root through osmosis without the requirement of any metabolic energy.

Assertion (A): Absorption of soil water by root is mostly an active process.
Reason (R): Most of the water is absorbed by the plants through osmotic mode that occurs due to concentration gradient and hence does not require metabolic energy

The correct option is D
A is false and R is true.

Plants absorb soil water with the help of root system. Concentration of water is more in soil than roots and hence water enters into root through osmosis without the requirement of any metabolic energy.