Answer:
The answer is larynx. I believe it is anyways. Sorry if i'm wrong.
<span>hydrothermal vents can be one the energy soruces for them</span>
The answer that fits the given blank above is the term ASSIMILATION. In the process of assimilation, there is a large production of organic nitrogen and this includes amino acids, other proteins, and nucleic acids. This is when nitrogen is converted into ammonia.