The cell wall is tough, flexible and fairly rigid layer that surrounds some types of cells. it is located outside the cell membrane and provides cells with structural support and protection. all but one type of organism has cells with cell walls. that is a(n)
a) animal.
b) bacteria.
c) fungus.
d) plant.

Ans. (A). animal.

Cell wall can be defined a tough outer covering of cells that protect the plasma membrane and provides shapes and rigidity to the cells. Cell wall is found in bacterial cells (made up of peptidoglycan), plant cells (made up of cellulose), fungal cells (made up of chitin), and in some protists.

Cell wall is absent in animal cells and exoskeleton works to provide shape and strength to the animal cells.

Thus, the correct answer is option (A).