Option 2 is the correct answer because two bases will be equal in quantity
When a tissue's metabolic rate increases, so does its carbon dioxide waste production. When released into the bloodstream, carbon dioxide forms bicarbonate and protons through the following reaction: ... These waste products lower the pH of the blood, which increases oxygen delivery to the active muscles.
RNA is a single stranded nucleic acid that plays a role in protein synthesis.
Mating is a innate adaptation.