<span>As far as I remember, cell-mediated immunity differs from humoral immunity in that </span>they respond differently to invaders
The best and most correct answer among the choices provided by your question is the first choice or letter A.
The resulting liquid is now classified as a solution.
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Answer: Parts per million (ppm)
Explanation:
Consider the units milligram per milliliter. This gives us one part of the solute per one million parts of solvent. That is 10^ -3/10^-3= 10^-6. This unit is commonly used in analytical chemistry to show very small concentration of analyte. A similar unit is parts per billion(ppb)
