Suppose that Biuret reagent turns purple when it is added to an unknown substance. What can you conclude about the substance? A. The substance is an acid.
B. The substance contains protein.
C. The substance contains starch.
D. None of the above are valid conclusions.​

Select all of the methods through which a drug can enter your body. injection swallowing inhalation absorption

Aglow stick contains a glass vial with chemicals. when the glow stick is bent, the vial breaks and the chemicals react to produce a glow. a science student observes that a glow stick kept in the freezer glows for a longer duration than a glow stick kept at room temperature. what conclusion can be drawn based on the observation? be sure to note the outcome and test variables in the conclusion.

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