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13. Null hypothesis is: a. a hypothesis that specifies what the results will be if the main hypothesis being tested is wrong b. a tentative explanation for a natural phenomenon that can be tested by experimentation c. experimentation done with technique different from the standard procedure d. same experimentation with same parameters but with different results 14. Positive control is: a. Always water b. An established reference point used as standard of comparison c. Substance charged positive (+) d. All is wrong 15. Dependent variable is: a. anything that can support the null hypothesis b. parameter that we introduce to modify the results c. parameter that we introduce to prove that the hypothesis is correct d. what we measure 16. A statement such as "If human body temperature increases to a certain level, then critical proteins will be denatured" would most likely be: a. a hypothesis b. conclusions c. deductive reasoning d. Inductive reasoning MICROSCOPE