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Question

Each stoma is guarded by:


A

Guard cell

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B

Palisade cell

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C

Mesophyll cell

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D

Parenchyma cell

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Solution

The correct option is A

Guard cell


The correct option is A:

Explanation of correct option:

Stomata are the small pores in plant stems or leaves that allow carbon dioxide in and oxygen and water vapor out.

Each tiny hole is called a stoma and is surrounded by a pair of cells called guard cells.

Explanation of incorrect answer:

Option B:

Palisade cells contain chloroplast to help plants in photosynthesis.

Option C:

Mesophyll cells are the principal center for photosynthesis.

Option D:

Parenchyma cells conduct most of the plant's metabolic functions, such as storage of energy and waste products support for photosynthesis, gaseous exchange.

Final answer: Each stoma is guarded by guard cells.


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