Nitrogen fixation is one-way nitrogen moves through ecosystems. Why is nitrogen fixation necessary for ecosystems? A. Nitrogen fixation converts nitrogen gas into carbohydrates.
B. Nitrogen fixation returns nitrogen gas to the atmosphere.
C. Nitrogen fixation allows nitrogen gas to be dissolved in water.
D. Nitrogen fixation converts nitrogen gas to ammonia.

hi my name is ashlynn and im 15

these macromolecules could either be amino acids, proteins or nucleic acids. they are responsible for the chemical changes and reactions that affects largely the cell and its composition. take for instance the cytoplasm of the cell where these organelles are settled. these simple organelles are composed of macromolecules which ignites and catalyses different functions that enables cells, in macro-perspective in motion and metabolism. in intestines for example, metabolism happens and breaking down parts of a food to simpler compounds that are used and these nutrients delivered throughout the body and again broken down by into smaller components.

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is this a ?

answerhomologous structures;