The genetic change in a population or species over many generations is evolution. Whether it be physical or mental increase.
Answer:
They were not around at that time or either from it being so hot they just disappeared/melted.
Explanation:
Please dont cheat your way through medical school
By tar, I think you mean nicotine. (I Hope). It affects the nerve signals that regulate breathing.
<span>Air is breathed in, it goes through the pharynx (if you are breathing through your nose), down the trachea (lung pipe), and into the lungs. Air is breathed in, it goes through the pharynx (if you are breathing through your nose), down the trachea (lung pipe), and into the lungs.
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