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Guard cells are responsible for openin...

Guard cells are responsible for opening and closing of the stomata

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Assertion: Each stoma is composed of two bean shaped cells known as guard cells. Reason: Guard cells regulate the opening and closing of stomata.

Guard cells help in:

Stomatal opening or closing is due to

Match column I withcolun II and select the correct option from the given codes. {:("Column I","Column II"),(A." Bulliform cells",(i)." Regulate opening and closing of stomata"),(B." Guard cells",(ii)." Aerating pores in the bark of plant"),(C." Lenticels",(iii)." Rolling in and out leaves"),(D." Subsidiary cells",(iv)." Accessory cells"):}

The …………. cells are responsible for the perception of colours.

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What causes the opening and closing of guard cells of stomata during transpiration?