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Bacteria: Science Lesson: Activity 1 of 3

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All living things—from bacteria to animals—are made up of cells. Bacteria are single-cell organisms and among the oldest and tiniest life forms on the planet. Even though one bacterial cell is so small that we can only see it through a microscope, it is a complete organism, equipped with everything it needs to survive. A single bacterium consumes nutrients, grows up, and reproduces right under our noses in its microscopic world. Let’s take a closer look at a bacterial cell. The cell is like a little factory that processes nutrients into materials it needs to survive and to grow.

Almost all bacterial cells have a fairly rigid cell wall. Look at the diagram. What do you think best describes the main function of the bacterial cell wall?
Question 1 of 10