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the collection and disposal or recycling of waste materials and the monitoring of waste.
animals that lack a cavity between the digestive tract and the outer body wall.
a complex organic substance needed by the body in small amounts for normal growth and...
the teeth found at the back of the mammalian jaw. In herbivores they have broad surfaces and...
liquid which fills the spaces around the cells. It is derived from blood plasma but lacks the...
the broad band of tissue in plant organs under the epidermis, including the parenchyma cells and...