Many cells have a cell wall, but animal cells do not. Why might this be?

Q. Many cells have a cell wall, but animal cells do not. Why might this be?

A

Because animal cells only exist in the multicellular form

B

Because animal cells do not need structural support

C

Because animal cells are capable of movement

D

Because animal cells can control osmotic pressure

Solution:

Most cells require a cell wall in addition to a cell membrane for structure and to prevent the osmotic pressure differences between the inside and outside of the cell.
Animal cells have pumps and transporters in the cell membrane to remove or acquire solutes and water thus preventing cytolysis.
Animal cells do need structural support but this is achieved by the cytoskeleton within the cell and not a cell wall surrounding the cell.

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