Question

comment why transpiration is a necessary evil

Answer 1

Transpiration is necessary because it lowers the temperature of plant body.But it is also evil as it extracts out water from plant body.Combining the factors, transpiration is hence a necessary evil.

Answer 2

Transpiration is very important and necessary for trees and botanical life's.
It's a undivisional part of their life.
By this every part of trees take they are nutrition and water from the Earth because via photosynthesis every tree take energy minerals and water from the soil so transpiration is necessary for them.

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