What would be the dependent and independent variable in this experiment?

ok so Mike is testing a mixture of water, nucliec acid and sugar, in test tube A in test tube B he has all of those ingredients excpet for he added salt. he then mixed them all together and heated them up. so will you please explain what the independent and dependent variable are thanx and il pick a best answer.What would be the dependent and independent variable in this experiment?
the salt would be the dependantWhat would be the dependent and independent variable in this experiment?
The answer is... Mike.

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