Nitrogen in the soil gets converted back into nitrogen gas by denitrifying bacteria - they use nitrates in the soil to carry out respiration and produce nitrogen gas.
this only takes place in anaerobic conditions (where there is no oxygen) such as in waterlogged soil.
Octopus<span> muscle fibers run in all directions; when contracted, they form a "skeletal" support system.</span>
The catfish that survive must have been born with an adaptation to the increase of salt in their fresh water environment. The remaining catfish would then be able to reproduce and the new catfish would have the same trait. Eventually the whole population will have this trait which would drive evolution.
I think the answers Mutations
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I hope this helps it's a picture of how to solve to get amino acids.
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