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reactions in which large complex molecules are broken down to form smaller,simpler molecules;these reactions usually release energy
a disease caused by the human immunodeficiency virus (HIV).
the neurons that link motor and sensory neurons within the central nervous system.
group of similar organisms that can breed with each other to produce fertile offspring. It is...
in plants: the female reproductive organ of the flower where the ovules are formed.
chlorofluorocarbons (CFCs) are organic compounds that contain carbon, chlorine and fluorine.