In osmosis,there is movement of

When does water move out of a cell through exosmosis?

An onion peel was taken and
$(a)$ placed in salt solution for five minutes.
$(b)$ after that it was placed in distilled water.
When seen under the microscope,what would be observed in $(a)$ and $(b)$?

Plants cannot grow in areas with high salt concentrations because of $.......$

Movement of water by diffusion is called

Food can be kept for a longer time in a cold house than in normal conditions because: