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Biology Revision notes:
The Carbon and Nitrogen Cycles

Photosynthesis and respiration are the exact opposite of each other, and because both processes
take place, Carbon Dioxide and Oxygen are continually recycled and balanced.

Decomposers and nutrients:

In all ecosystems, dead organisms and waste material are broken down by bacteria and…

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Atmospheric Nitrogen is present as N2 in the atmosphere.
During storms, lightning converts nitrogen into nitrogen oxide, which dissolves in rain and
forms nitrates in the soil (NO3)2- (Nitrogen and Oxygen).
The nitrates in the soil are absorbed (active transport) into plants to make proteins are other
nitrogenous compounds


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