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an infectious disease that can be spread or transmitted from one person to another.
the control of an invasive species using the species' natural enemies (biocontrol agents)...
the main blood vessel that returns deoxygenated blood from the head and thorax to the right...
the small amount of air that always remains in the lungs during breathing.
a chemical messenger produced and released by a cell or a gland in one part of the body of the...