Many scientists never wear a lab coat at all. Some work in fields that don't require lab work and do their work behind a computer. Some use their science degrees to teach or write about science. Some work as consultants for companies, or as editors for scientific journals.
I think it is B because horses now have flat teeth, while horses back then had sharper teeth, I think. Tell me if I am wrong.
Answer:
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The break down of carbon based molecules into smaller molecules
