Water channels are

Facilitated diffusion is characterized by all,except

The entry and exit of ions to and from the symplast requires the expenditure of

Which pathway is responsible for the majority of water transport in plants?

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.

By which processes does passive transport occur?