- The Nitrogen Cycle
Nitrogen is an important element in
It makes up
almost 80% of...
![subject](/tpl/images/cats/biologiya.png)
Biology, 12.02.2020 08:36 kingindoraptor
- The Nitrogen Cycle
Nitrogen is an important element in
It makes up
almost 80% of earth's _ and is required by organisms to make
_. Atmospheric nitrogen cannot be used by
living things so it must be converted into usable forms. The nitrogen
cycle is the movement of nitrogen through the food chain from
simple
_(not made from living things) compounds into
complex _
(made from living things) compounds.
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Answers: 3
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