PLANT PHYSIOLOGY
TRANSPORT IN PLANT
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Guard cells open the roots to absorb water.
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Guard cells are bean shaped cells that line the openingof the phloem.
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Guard cells are bean shaped cells that line the openingof the xylem.
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Guard cells are bean shaped cells that line the openingof the stomata and open and close the stoma.
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Detailed explanation-1: -Guard cells are cells surrounding each stoma. They help to regulate the rate of transpiration by opening and closing the stomata. Light is the main trigger for the opening or closing. Each guard cell has a relatively thick cuticle on the pore-side and a thin one opposite it.
Detailed explanation-2: -Guard cells are a pair of two cells that surround each stoma opening. To open, the cells are triggered by one of many possible environmental or chemical signals. These can include strong sunlight or higher than average levels of carbon dioxide inside the cell.
Detailed explanation-3: -Guard cells are kidney shaped cells that surrounds the stomata. They control the opening and closing of the stomata. When the plant has an excess of water, the guard cells swell and create an opening for the exchange of gases.
Detailed explanation-4: -In plants, gases are exchanged through small openings called stomata which are present mostly on the lower surface of leaves and on green stems. Each stoma has two bean-shaped cells called guard cells.
Detailed explanation-5: -Guard cells are pairs of epidermal cells that control gas diffusion by regulating the opening and closure of stomatal pores. Guard cells, like other types of plant cells, are surrounded by a three-dimensional, extracellular network of polysaccharide-based wall polymers.