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Monday, March 10, 2014

All living things

All living things are made up of cells. Cells are made up of proteins, which in turn are largely made up of nitrogen. Living things can't just get nitrogen from the air the way they get oxygen.
 That's where other important organisms of an ecosystem come in. These organisms are decomposers such as mushrooms and other fungi,and bacteria.
Decomposers break down animal and plant remains. They convert the nitrogen back into substances that can be used again by living things to make proteins.
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