(a) How does carbon dioxide from the air enter the leaves of a plant to be used in photosynthesis?
(b) How does water from the soil reach the leaves of a plant to be used in photosynthesis?

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Solution

(a) Carbon dioxide from the air enters the leaves of a plant through tiny pores present on the lower surface of the leaves called stomata.
(b) Water is absorbed from the soil by the root hairs present in the roots of the plants through the process of osmosis.

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(a) How does carbon dioxide from the air enter the leaves of a plant to be used in photosynthesis ?
(b) How does water from the soil reach the leaves of a plant to be used in photosynthesis ?

Q. Assertion (A): Plants help to purify air by taking in carbon dioxide.

Reason (R): Carbon dioxide is used in photosynthesis.

Q. Photosynthesis takes place in cells found in the leaves of plants. In which plant cell organelle does photosynthesis take place?

Assertion : Less than 1% of the water reaching the leaves is used in photosynthesis and plant growth.

Reason: Most of the water is lost through the stomata in leaves by transpiration

Q. Carbon dioxide in air is used by plants to
(a) breathe.
(b) make food.
(c) remove waste.
(d) trap energy of sun for photosynthesis.

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(a) How does carbon dioxide from the air enter the leaves of a plant to be used in photosynthesis? (b) How does water from the soil reach the leaves of a plant to be used in photosynthesis?

(a) Carbon dioxide from the air enters the leaves of a plant through tiny pores present on the lower surface of the leaves called stomata.(b) Water is absorbed from the soil by the root hairs present in the roots of the plants through the process of osmosis.

(a) How does carbon dioxide from the air enter the leaves of a plant to be used in photosynthesis?
(b) How does water from the soil reach the leaves of a plant to be used in photosynthesis?

(a) Carbon dioxide from the air enters the leaves of a plant through tiny pores present on the lower surface of the leaves called stomata.
(b) Water is absorbed from the soil by the root hairs present in the roots of the plants through the process of osmosis.