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the thin, protective layer of gases around the Earth.
an enzyme that catalyses (speeds up) the hydrolysis (breaking) of a chemical bond.
the sequence of events relating to the flow of blood or blood pressure in the heart that occurs...
informal, local knowledge that has been built up over the centuries by the people who live in a...
biological classification group (taxon) for plants that are divided into classes.
drugs that are used to treat infections caused by bacteria. Many antibiotics are produced by...