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alternate units of measurement of energy supplied by food.
a thick layer inside the primary cell wall. It consists mainly of cellulose, hemicellulose and...
blood that has no antigens (blood group O) and can be given to a person with any blood group....
waste water from sinks, washing machines, dishwashers, showers and baths, which can be used for...
primitive type of fish that lives very deep underwater and has four leg-like fins. It is thought...
outer body tissue layer that forms the epithelium and nervous tissue.