D. Is a fly shot effective in preventing the flu?
Answer A touches on the topics of economics and industrial feasibility of the flu shot.
B is more of an ethical / situational question.
C is a social question.
D is the only question which focuses on the science of microbiology and medicine.
Answer:
a,water particles are set in a circular motion
Electrolysis and heat can separate a compound into its elements.
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It is called phosphorescent substances.
The nucleus consists of the protons and neutrons. It contains the most mass in the atom.