Answer:
Oxygen
Explanation:
Plants produce oxygen as a bi-product during photosynthesis.
I believe the water will vaporize when it reaches a certain temperature. I'm not good in this subject, but I think I'm correct. Hope this helps. :)
That'll be guanine. If you look up "pyrimidine" in google, it will tell you the two nucleotides that are pyrmidines are cytosine and thymine. So that leaves guanine.
