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competition between organisms of different species.
potentially lethal disease in humans and grazing animals such as cows and sheep. The disease is...
a molecule that accelerates (speeds up) a chemical reaction, by lowering its activation energy,...
tough cartilage that acts as a shock absorber between vertebrae and at the ends of bones in ball...
animals with three cellular body wall layers: the ectoderm, mesoderm and endoderm.
the structural and functional unit of the kidney, which filters the blood and produces urine....