Question

Given below is a figure of a ‘probable pathway of water through leaf cells during transpiration’. Before transpiration, certain processes occur in the cells like imbibition, evaporation, osmosis, diffusion, etc.

What will be the correct sequence for the processes A, B, C and D mentioned in the figure?

Options

• Imbibition, Osmosis, Diffusion, Evaporation

• Diffusion, Evaporation, Imbibition, Osmosis

• Evaporation, Diffusion, Osmosis, Imbibition

• Osmosis, Imbibition, Evaporation, Diffusion

Answer 1

Osmosis, Imbibition, Evaporation, Diffusion

Explanation:

First, a small proportion of water enters the cells by osmosis. Then most of the water moves along the cell walls by imbibition. From the cell walls, water evaporates into the intercellular spaces by evaporation. Finally, the water vapour moves out of the leaf into the outside air by diffusion.