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a disease that lasts for a long time.
the process whereby substances dissolved in the blood (such as H+ ions, nitrogenous waste and...
consists of the pectoral and pelvic girdles together with the arms and legs.
(also called transgenic organism) an organism whose genetic material has been changed using...
the actions of the body's immune system that work to fight infections or disease.
an informal term for any living species which appears to be the same as a species otherwise only...