Which is the substance formed from decomposing matter?
question 9 options:

ammonia

carbon

nitrogen

phosphorus

Ammonia

Explanation:

Animals feed on plants and assimilate the plant proteins into animal proteins. When plants and animals die, they are acted upon by saprophytic bacteria and fungi forming ammonium compounds. Organic compounds break down by the action of living organisms anaerobically. These organisms use nitrogen, phosphorus, and other nutrients to live and to develop cell protoplasm, but they reduce the organic nitrogen to organic acids and ammonia.

"1. it should be, it has been for about 20 years, and it's really not much different in the end than breeding animals to have particular traits. there are always concerns about genetically engineered animals/plants affecting the environment in unexpected negative ways, but i can't think of an example where the fears didn't turn out to be baseless.  

first, as you point out, it would be a great advance in pharmacology, to be able to tailor drugs and their doses to me. the pros involve better medical treatment. the cons involve privacy issues like insurance companies denying coverage to people with genetic risk factors. looking at dna markers wouldn't affect the frequency of genetic diseases, but it would allow detection of them earlier. and ok, actually i suppose that if people used this information to avoid having children with genetic diseases, some might decrease in frequency."