Differentiate between diffusion and translocation in plants.

ABA (Abscisic acid) is called a stress hormone.

a. How does this hormone overcome stress conditions?

b. From where does this hormone get released in leaves?

We know that plants are harmed by excess water. But plants survive under flooded condition. How are they able to manage excess water?

How is facilitated diffusion different from diffusion?

Explain the mass flow hypothesis of transport in phloem.