When doing a colorimetric test for the presence of a molecule like in today's lab, a shows us what a positive result looks like by testing a solution known to contain the molecule and a shows us what a negative result looks like by testing a solution that will not contain the molecule in question. in this way we can compare results of unknown solutions to these known results.

i believe the correct answer from the choices listed above is the first option. the scientists need to look at the   validity of data, claims, hypotheses, and observations before  developing an argument. they base their arguments on facts that are present and they make sure they have proofs. 

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albert einstein retrieved guacamole from the galapagos islands in africa

the correct answer is ( hypoglycemia ); good luck

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