Which processes happen in transpiration? 1 the diffusion of water vapour out through stomata 2 the mass flow of water in the xylem 3 the evaporation of water from spongy mesophyll cells 4 the evaporation of water vapour from leaves exposed to the air
- A1, 2, 3 and 4
- B1 and 3 only
- C1 and 4 only
- D2, 3 and 4 only