Radioactive isotopes are biological tools that are often used to:
A) measure the size of fossils.
B) detect brain tumors.
C) build up a store of calcium in a cell.
D) increase the pH of blood.
Correct Answer:
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Q7: If you examined the human body, which
Q8: Iron is an important element in human
Q9: If a certain atom has a tendency
Q10: The atomic number of an atom is
Q11: The formation of sodium chloride (NaCl)is the
Q13: Free radicals are considered dangerous because they:
A)attack
Q14: Phosphorus has an atomic number of 15,
Q15: A substance with specific properties that cannot
Q16: An atom's nucleus is composed of:
A)protons only.
B)neutrons
Q17: Imagine that you have been hired as
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