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Mark the one, which is NOT the characteristics of the guard cell?

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Mark the one, which is NOT the characteristics of the guard cell?

(a) Thickened inner wall

(b) Connected end to end

(c) Does not have chloroplast

(d) Radial micellation

The question was posed to me during an online interview.

This key question is from Transpiration in division Plant Physiology of Life Sciences

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Correct choice is (c) Does not have chloroplast

The explanation: The epidermal cells of guard cell show chloroplast. They have a thin outer wall and thick inner wall and constitute an important functional element of the plant.

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