Question

Explain the term:

Active absorption

Answer 1

1. In this, water is absorbed due to the activity of roots.
2. Root cells play an active role in the absorption of water.
3. The driving force is the root pressure developed in the living cells of the root.
4. Active absorption usually occurs at night when transpiration stops due to the closure of stomata.
5. As water absorption is against the DPD gradient, there is an expenditure of ATP (energy) generated through the respiratory activity of cells.