Biology
Radioactivity is a phenomenon of the spontaneous emission of

protons (alpha particles)
gamma rays (short wave electromagnetic waves)
electrons (beta particles)
All of these

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Biology
Which of the following statements is not true about metabolism?

Basal metabolism is the amount of energy needed for sustaining life
Basal metabolism is measured by the amount of calories burned when your body is inactive
Younger people generally have a slower metabolism than adults
Metabolism is influenced by numerous factors, such as heredity and age

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