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the end part of the digestive system that consists of the caecum, colon, rectum and anus.
pollutant gases such as nitrogen monoxide and nitrogen dioxide. They are produced during ...
symbiosis where one organism lives on another (on the outside of another).
the broad band of tissue in plant organs under the epidermis, including the parenchyma cells and...
biological, chemical, or physical agent that stimulates a characteristic function or causes a...