Question

2 Which of the following structures of a plant is responsible for transpiration?
Xylem
Root
Stomata
Bark

Answer 1

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Your answer would be Stomata.
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STOMATA -

It's a very fine pores which is responsible for gaseous exchange and mostly situated on the under surface of leaves. Besides transpiration, it allows the entry of carbon dioxide during photosynthesis and release of excess oxygen.

there are some specialised cell present on stomata which controls the opening and closing of Stomata.

Functions -
✓ It helps in gaseous exchange.
✓ It helps in transportation.
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TRANSPORTATION -

Loss of unusual excess water in the form of vapour generally from leaves through stomata is known as Transpiration.

Many of the plant physiologists hold the view of Transpiration is a price which the plant pays for Photosynthesis. As the Stomata open in the light for gaseous exchange, water vapour escape side by side. When stomata are closed in dark, loss of water through Transpiration is minimum.

Functions -
✓ Removes excess water.
✓ Help in thermoregulation.
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Hope it will help you...
Best of luck...