Differences between Transpiration and Evaporation :

 S.No. Transpiration                                                                             Evaporation

1. It is a modified physical phenomenon found                 It is a physical process taking place 

in plants.                                                                                              any free surface.

2. It is regulated by the activity of guard cells.                     No such mechanism is found in

evaporation.

3. In the process, only living cells exposed to                      It can occur from both living and

the atmosphere are involved.                                                        non-living surface.

4. This involves different types of pressures                   In the process, no such forces are involved.

such as vapor pressure, diffusion pressure,

OP etc.

5. It helps in keeping the surface of the leaf and young        It causes dryness of the free surface.

stem wet to protect from sun burning.