Looking Inside Cells

Each kind of cell structure has a different _______ within a cell.

The rigid layer that surrounds the cells of plants and some other organisms is called a _____ _____.

(a)  

What does an animal cell NOT have?

What helps protect and support the cell?

The cell wall is mostly made of ________.

What two things can pass through the cell wall easily?

This controls which substances pass in and out of the cell.

EVERYTHING that a cell needs, such as food particles, water, and oxygen, enters through the ______ _________.

(a)  

The cell membrane prevents ______ materials from entering the cell.

Only plant cells have a cell membrane.