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Photosynthesis

Assertion A: ...

Question

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

Reason (R): Carbon dioxide is used in photosynthesis during daytime

A

A is true and R is false.

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B

A is false and R is true.

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C

Both A and R are true and R is the correct explanation for A.

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D

A and R both are true but R is not the correct explanation for A.

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Solution

The correct option is C Both A and R are true and R is the correct explanation for A.
Animals exhale carbon dioxide during breathing. Plants take up that carbon dioxide during photosynthesis and release oxygen during the daytime . This helps in decreasing the amount of carbon dioxide from the air, while increasing the concentration of oxygen.

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Q. State whether the following statements are true of false:

Statement 1: Plants help to purify air by taking in carbon dioxide.
Statement 2: Carbon dioxide is used in photosynthesis during daytime.

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