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(a) Name the plants in which the guard c...

(a) Name the plants in which the guard cells of stomata are dumb-bell shaped.
(b) What are the constituents of stomatal apparatus ?
(c) What is the function of trichomes in the shoot system?

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(a) Dumb-bell shaped guard cells occur in the stomata of grasses.
(b) Each stomatal apparatus consists of a stomatal aperture, two guard cells and surrounding subsidiary cells.
(c) Trichomes in the shoot system help in preventing water loss due to transpiration.
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