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substances that have a harmful effect on the environment and also on human health.
anaerobic respiration that occurs in plants and results in the formation of ethanol and carbon...
a method of ordering the age of different fossils, relative to each other, without working out...
coiled nephron tubule which extends from Bowman's capsule to the loop of Henlé.
the membrane that surrounds the nucleus. It is similar in structure and function to the cell...