How does the cell wall protect a plant cell?
the cell wall is thick and fibrous and provides a barrier between the cell and its external environment.
the cell wall does not protect the cell because the cell membrane does.
the cell wall is thin and flexible, which allows the cell to be moved without harming the organelles.
the cell wall is on the inside of the cell and serves to contain the contents of the cell.

The cell wall is thick and fibrous and provides a barrier between the cell and its external environment.

Explanation:

A cell wall is an important layer which envelops a plant cell. It is present just outside the cell membrane. It can be tough, rigid or flexible. It is a thick layer that is composed of cellulose fibers. It exhibit holes which are called as plasmodesmata that allows the movement of the substance in and out of the cell. It prevents the loss of water due to external heat.

desert perennials often survive by remaining dormant during dry periods of the year, then springing to life when water becomes available. most annual desert plants germinate only after heavy seasonal rain, then complete their reproductive cycle very quickly.

the answer is c. altitude. hope this ! #brainiac