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the practice and science of classification. This is the part of systematics that is only concerned with providing scientific names for organisms, describing them and preserving collections of them, and providing classifications for the organisms, keys for their identification, and data on their distributions.
a black substance that coats the lungs of a smoker, causing cancer of the respiratory tract.
a molecule found inside red blood cells that can carry both oxygen and carbon dioxide.
the complete set of alleles (different forms of genes) making up the genetic material of a...
a substance, usually a liquid, in which other substances can dissolve.