Question

Take a transparent plastic bag. Tie it over a leaf of a plant as shown in the picture. Observe it after six to seven hours. What do you see?

Droplets of water collect on the inside of the bag. It means· that, plants excrete water in the form of vapour. 

Answer 1

After six to seven hours, you will see water droplets inside the plastic bag. This happens because the leaf releases water vapour through tiny pores on its surface. This process is called transpiration.