Water exits the leaves of plants and enters the atmosphere. what is this process called

The process of water exiting out of the leaves of the plants and that enters to the atmosphere thereafter is called transpiration. Transpiration is the plant version of respiration of animals. Through water cycle, water is absorbed to the atmosphere then brought back to the earth through precipitation

Limitation of comparative is that when it is done on a huge population, huge amount cost is required.

Benefit of comparative is that we can get descrete information about specific breed or species.