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Question
At low temperature water absorption decreases due to
(I) An increase in the viscosity of water and protoplasm.
(II) A decrease in the permeability of cell membranes.
(III) A decrease in the metabolic activities of root cells.
(IV) A check in the growth and elongation of roots.
At low temperature water absorption decreases due to
(I) An increase in the viscosity of water and protoplasm.
(II) A decrease in the permeability of cell membranes.
(III) A decrease in the metabolic activities of root cells.
(IV) A check in the growth and elongation of roots.
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Solution
The correct option is D All are correct
At low temperature, there will be physical changes in water and also water absorption, both due to active and passive means will decrease. There will be an increase in viscosity of water and decrease in respiration in roots. The decreased respiration will lead to reduced supply of ATP. Hence, active absorption will decrease. Also, growth of roots will suffer due to decrease in rate of metabolism. The cell membrane will become less permeable and there will be lesser movement of solutes across them. As temperature rises, the lipids become more fluidic and permit movement of more solutes across the membrane.
At low temperature, there will be physical changes in water and also water absorption, both due to active and passive means will decrease. There will be an increase in viscosity of water and decrease in respiration in roots. The decreased respiration will lead to reduced supply of ATP. Hence, active absorption will decrease. Also, growth of roots will suffer due to decrease in rate of metabolism. The cell membrane will become less permeable and there will be lesser movement of solutes across them. As temperature rises, the lipids become more fluidic and permit movement of more solutes across the membrane.
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