Why is transpiration a necessary evil?
Biology · Middle School · Tue Nov 03 2020
llm
Answered on
Transpiration:
- It is the loss of water through the aerial parts of the plant.
- The water is typically lost in the form of water vapours.
- The tiny opening present on leaves i.e stomata helps in the movement of water out of the plant.
Transpiration is called necessary evil because:
- It causes around 90% of water loss for the plant.
- But it is necessary for the plant since it causes a suction force known as transpirational pull.
- This suction force helps in transporting water up to larger heights in plants against the force of gravity.
- It also leads to excessive loss of water sometimes causing the wilting of leaves.
- Thus, transpiration is termed a necessary evil.