A substance or agent that induces the development of cancer.
A general term for any condition that impairs the normal functioning of an organism.
Deoxyribonucleic acid, a molecule in all cells, and many viruses, containing genetic codes for inheritance.
A term for a disease that is communicable or contagious and comes from outside the body. Compare with intrinsic.
A unit of information about a particular heritable (capable of being inherited) trait that is passed from parent to offspring and stored in DNA molecules called chromosomes.
The study of hereditary traits passed down from one generation to the next through the genes.
A cell or group of cells that filters material from the blood, processes that material, and secretes it either for use again in the body or to be eliminated as waste.
A term for a disease that is not communicable or contagious and comes from inside the body. Compare with extrinsic.
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