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Answer:
both A and B
Explanation:
Together, the number of protons and the number of neutrons determine an element's mass number.
What type of prefixes are you looking for, for this question
Answer:
Hormones are able to travel the body but only affect certain cells because only those target cells have receptors for that particular hormone. Some hormones bind to receptors on the surface of target cells. Others enter the cells and bind to receptors in the cytoplasm or nucleus.
