HORTICULTURE SCIENCE
PLANT BIOLOGY
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 Question 
 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
 
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 Which of the following helps to reduce the lose of water from a plant? 
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  the arrangement of palisade mesophyll cells 
 
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  the presence of xylem 
 
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  the waxy layer of cuticle 
 
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  the arrangement of spongy mesophyll cells 
 
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 Explanation: 
Detailed explanation-1: -So the leaf has another adaptation to reduce water loss: the waxy cuticle, so called because it is made out of a water-repellent substance called cutin.
Detailed explanation-2: -Thick waxy cuticle-the cuticle cuts down water loss in two ways: it acts as a barrier to evaporation and also the shiny surface reflects heat and so lowers the temperature.
Detailed explanation-3: -A waxy layer known as the cuticle covers the leaves of all plant species. The cuticle reduces the rate of water loss from the leaf surface.
Detailed explanation-4: -The thick cuticle on leaves reduces water loss. Some plants have stomata only on the lower side. Some of the plants have sunken stomata to reduce water loss.
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