The best way for adolescent to build and protect his or her bones is to ingest food products that are rich in calcium for it is known to make bones stronger. Another way is to be able to do exercise as a daily routine so that the bones are exercised every day to prevent bone disease, this will stenghten the bones and make them more stronger.
Natural variation provided the phenotypes that natural selection then acted on, over time causing evolution
Answer:the planets are moving sideways.
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Answer:a compound present in the body as a neurotransmitter and a precursor of other substances including epinephrine
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