Answer:
Low - The generation of nitrates (NO 3-) requires oxygen, so the oxygen levels will be low
Explanation:
Nitrates are formed when the ammonia react with oxygen present in water. The oxygen which react with ammonia is not the oxygen of water molecule, it is the dissolved oxygen. This oxygen is used by aquatic animals for breathing. If nitrates are formed so the concentration of dissolved oxygen will be lowered which causes suffocation and bad impact on marine organisms and the whole ecosystem will be disturbed.
 
        
             
        
        
        
Fatty acids
fatty acid synthesis is the formation of fatty acid from acetyl coa and NADPH with help of the enzyme known as fatty acid synthases. This reaction occurs inside the cytoplasm of the cell. The fatty acids that were formed were derived from carbohydrates via glycolytic pathway. This pathway can also give glycerol which is different form fatty acids
        
             
        
        
        
Domain Archaea 
Like bacteria,Organisms in domain Archaea are prokaryotic and unicellular. Superficially, they look a lot like bacteria, and many biologists confused them as bacteria until a few decades ago.