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is the supply of materials, in the form of food, required by organisms and cells to stay alive.
modified phloem parenchyma cells that help translocate food substances in the plant.
middle body tissue layer that forms the muscular, circulatory and excretory systems.
a structure that is used by molluscs for feeding. It is a minutely toothed, chitinous ribbon...
part of the skeleton that occurs in the head which supports the structures of the face and forms...