When do the C-14 atoms decay on each repetition?always after the half-life mark always before the half-life mark
at random times
at the same time
in 1,000-year intervals
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How does the viscosity of magma change as magma cools?

What is the molecular weight of copper

Which is true concerning the products and reactants of photosynthesis and cellular respiration? a. the products of photosynthesis are sugars and the reactants of cellular respiration are starches. b. the products of photosynthesis are reactants in cellular respiration. c. oxygen is needed for photosynthesis and is given off in cellular respiration.