Final answer:
Animal cells lack a cell wall, which gives them flexibility to take on different shapes.
Step-by-step explanation:
Animal cells lack a cell wall, which gives them flexibility and allows them to take on different shapes. Unlike plant and fungal cells, animal cells do not have a rigid exterior surrounding the cell. This lack of a cell wall allows animal cells to become specialized and perform specific functions. For example, a nerve cell can transmit long-distance impulses because it is not constrained by a rigid cell wall.