Identify the water transport pathways $P$ and $Q$ shown in the given figure.

Chloride ions : Simple diffusion :: Some amino acids and glucose : ...

The movement of water through the suberized layer of the endodermis under pressure is called:

Which of the following statements is correct?
$(I)$ Rapid uptake of ions into the free space is a passive process.
$(II)$ Apoplast is important for passive processes.
$(III)$ Metabolic energy is required in passive processes.
$(IV)$ In the apoplast,passive processes occur through ion channels.

Water channels are

Active transport involves: