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the surface on which an organism lives and gets its food.
(also called secondary thickening) growth due to new cells being formed by the secondary...
cellular respiration that takes place when free oxygen is absent
the membrane that surrounds the nucleus. It is similar in structure and function to the cell...
a state in which the body has become dependent on a chemical substance in order to function.
a chemical used as an antiseptic to prevent bacterial and fungal growth.