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(adenosine triphosphate), a compound used by cells for energy storage.
animals that live socially or in colonies and perform certain tasks for the good of the colony...
small solid particles of matter such as soot, ash, metal and dust.
small fluid-filled spaces in the matrix of bone and cartilage in which cartilage and bone cells...
the very cold zone in an ocean, dam or a lake, located below the range of effective light...
small groups of cells found in the pancreas that secrete the hormones insulin and glucagon.