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an atmospheric gas made of three oxygen molecules bonded together (O3).
the use of modern technology to manipulate living organisms to obtain products from them that...
refers to any variation in the nucleotides, genes, chromosomes, or whole genomes of organisms....
a molecule that accelerates (speeds up) a chemical reaction, by lowering its activation energy,...
a species that helps scientists identify the age of sedimentary rocks.
diet which contains all the nutrients needed by the body in the correct quantities and...