I think this is an example of competitive exclusion principle. Competitive exclusion principle is a proposition that two species competing for the same limiting resource can not coexist at constant population values.For Example the Red squirrel is native to Britain but its population has declined due to competitive exclusion, disease and the disappearance of hazel coppices and mature confer forests i law land Britain.
The only base that pairs with Guanine is Cytosine. Hope this helps!
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Answer is the first choice - form non-metals</span>. Some acid and metal reactions don't form anything especially with weak acids. But many acids react with metals to form salt and hydrogen, which are considered non-metals.
