Answer is 3 it uses chemical and physical changes when using stomach acid and physical when turning food in your stomach.
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In general, negative selection eliminates from the population very harmful changes to proteins that kill or stop reproduction. ... The authors also found a correlation between genes predicted to be under negative selection and genes implicated in certain hereditary diseases
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pharynx as it has functions in both the respiratory system and the digestive system.
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3215 F would be the platinum melting point.
it boiling point is 6917 F.
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There is not much to explain other then heat melts metals when high enough, I know this because I own a forge and platinum is one thing I use for melting.
