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Question

What happens when the leaves of a plant are smeared with grease and observed after a week?

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Solution

Covering the leaves with grease will close the stomatal opening present on leaf epidermis. Stomata helps in gaseous exchange and water evaporation or loss from leaf surface . Hence two major process of plant survival will be affected, which are :
I)Transpiration ( loss of water from leaf surface )
(ii) Photosynthesis / Respiration


it will reduce water loss from upper surface to moderate and from lower surface to minimum ( more stomata is present on lower surface). Gradually the plant will seize its metabolic activity resulting in plant death. I


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