how does bacterium's cell walls protect it?

Question

how does bacterium's cell walls protect it?

Answer 1

Bacteria do have cell walls. The plasma membrane is just inside the cell wall. Bacteria have both.

-- Cell walls are fairly rigid, so they protect the bacteria from minor physical impact.
-- Because cell walls offer support, bacteria are less likely to burst open when excess water diffuses into them (in a hypotonic solution).

Answer 2

I dont think bacterium have cell walls. Only plants have cell walls. Bacterium have membranes.

The membranes keep the cytoplasm from oozing everywhere. They mostly hold the bacterium together.