What is the difference between the cell wall and the cell membrane?

Answer 1

Cell walls and cell membranes differ in composition and function.

All species have cell membranes made of a fluid phospholipid bilayer that regulates what enters and exits the cell. In plants, the cell wall is made of cellulose and serves as structural support.

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Answer 2

Cooper Alexander

The cell membrane, also known as the plasma membrane, is a semi-permeable barrier that encircles the cell's cytoplasm and controls the flow of substances into and out of the cell. The cell wall is a rigid outer layer that is present in plant cells, bacteria, fungi, and some protists.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.