Question: why is it important for plant cells to have a cell wall

title: Cell wall
text: A cell wall is a structural layer surrounding some types of cells , situated outside the cell membrane . It can be tough , flexible , and sometimes rigid . It provides the cell with both structural support and protection , and also acts as a filtering mechanism . Cell walls are present in most prokaryotes ( except mycoplasma bacteria ) , in algae , plants and fungi but rarely in other eukaryotes including animals . A major function is to act as pressure vessels , preventing over-expansion of the cell when water enters . 

Answer: answer: Cell wall provides the cell with both structural support and protection , and also acts as a filtering mechanism . A major function is to act as pressure vessels , preventing over-expansion of the cell when water enters .