Biology

The correct answer is: B.Both A and R are true but R is not the correct explanation of A.

Here's the reasoning:

1.Assertion (A): "Animal cells do not contain a cell wall."

This is true. Animal cells only have a plasma membrane, which is flexible and allows for changes in shape. Unlike plant cells, fungi, and bacteria, animal cells do not have a rigid cell wall.

2.Reason (R): "Animal cells have to be flexible."

This is also true. Animal cells need to be flexible to perform various functions, such as movement (in muscles), cell division, and changes in shape during processes like phagocytosis....