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Envision a cold rainy day. You're sitting in your home, gazing out the window. But despite the bad weather, you're warm and dry thanks to the roof over your head. Bacteria have something very similar to a 'roof over their head' called a cell wall. The cell wall surrounds the entire bacteria, holding the cell together and offering protection. It also maintains osmotic pressure, meaning it lets in just the right amount of water and ions that the cell needs.
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The positive form is used to describe nouns (people, places or things) or to describe verbs (actions)
Peter is smart.
Smart is the positive adjective that describes Peter.
xD
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