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Introduction to Transpiration.

are pores in ...

Question

___ are pores in the leaf that allow gas exchange and the place where water vapour leaves the plant.

A

Stomata

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B

Cuticle

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C

Lenticel

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D

All of the above

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Solution

The correct option is A
Stomata

Stomata are pores in the leaf that allow gas exchange where water vapor leaves the plant and carbon dioxide enters.

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___ are pores in the leaf that allow gas exchange in the plant.

Q. Case: Transpiration is the evaporative loss of water by plants. It occurs mainly through the stomata in the leaves. Besides the loss of water vapour in transpiration, exchange of oxygen and carbon dioxide in the leaf also occurs through pores called stomata. Normally stomata remain open during the day and close at night.

Based on the above case answer the following question:

Which of the following is not a purpose of transpiration?

Statement 1: Gaseous exchange in plants occur only from the dorsal side of leaves.

Statement 2: Tiny pores called stomata facilitate the gaseous exchange.

Statement 3: The gases exchanged are carbon dioxide and water vapour only.

Q. Case: Transpiration is the evaporative loss of water by plants. It occurs mainly through the stomata in the leaves. Besides the loss of water vapour in transpiration, exchange of oxygen and carbon dioxide in the leaf also occurs through pores called stomata. Normally stomata remain open during the day and close at night.

Based on the above case answer the following question:

Water vapour comes out from the plant leaf through the stomatal opening. Through the same stomatal opening, carbon dioxide diffuses into the plant during photosynthesis. Reason out the above statements using one of the following options.

Q. Case: Transpiration is the evaporative loss of water by plants. It occurs mainly through the stomata in the leaves. Besides the loss of water vapour in transpiration, exchange of oxygen and carbon dioxide in the leaf also occurs through pores called stomata. Normally stomata remain open during the day and close at night.

Based on the above case answer the following question:

Which of the following statements is not true for stomatal apparatus?

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