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the natural resistances with which a person is born. It occurs because of a body's genetic make-up.
the second biological classification group (taxon) that is divided into phyla (for animals) or...
a part of the brain that is located below the thalamus having numerous functions, such as: it...
(also called macromolecules) large, more complex molecules formed when monomers join together....
extremely hard, calcium-rich substance which covers the crown of the tooth.
emitting (or giving off) radiation energy, which is harmful to living organisms.