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(also called secondary meristems) regions of cells capable of dividing to form new cells in the roots or stems of plants.
a molecule that is formed when oxygen and haemoglobin combine chemically.
waste water from sinks, washing machines, dishwashers, showers and baths, which can be used for...
tissue that binds organ components and organs together and supports structures of the body.
a sticky film that forms on the enamel of teeth. It is made up of small food particles, saliva...