__ is the structure which helps plant cells to protect against variations in temperature and high wind speed.

Cytoplasm

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Cell wall

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Nucleus

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Mitochondria

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Solution

The correct option is B Cell wall
Plant cells need protection against variations in temperature, high wind speed, atmospheric moisture etc. They are exposed to these variations because they cannot move. Hence in addition to the cell membrane, there is an outer thick layer in cells of plants called cell wall.

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