A small mesophytic twig with green leaves is dipped into water in a big beaker under sunlight. It demonstrates

Photosynthesis

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Respiration

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Transpiration

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None of the above

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Solution

The correct option is B Transpiration
There will be loss of water through the leaves if the beaker is kept covered. Otherwise direct evaporation of water from free surface will also happen. The purpose of this experiment is to demonstrate transpiration, which is loss of water through leaves of plants in vapour form.

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