Question

write short note on explain transpiration done by leaves, by demonstrating an activity​

Answer 1

Answer:

Transpiration is the evaporation of water from the surface of leaves through stomata. The phenomenon of transpiration can be explained by Bell jar experiment.

REQUIREMENTS:

Bell jar

Well watered potted plant

Rubber sheet

Glass plate

PROCEDURE:

Take the well watered potted plant and cover it with the rubber sheet. The aerial parts of the plant should be left uncovered.

Put the plant on the glass plate and cover with the bell jar.

Prepare a same setup but without a plant in the second bell jar.

Place the apparatus in sunlight for sometime.

OBSERVATIONS:

Water drops appear inside the walls of the bell jar containing potted plant whereas no water drops appear in the bell jar without a plant. This demonstrates that water is evaporated from the surface of leaves in presence of sunlight.