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epithelial tissue consisting of a single layer of cells.
the gradual wasting away of the body caused by severe malnutrition, in the form of inadequate...
the seepage of acidic, contaminated water from disused mines and mine dumps.
birds without a keel on their breastbones and therefore unable to fly, for example ostriches....
is one-millionth of a metre or one-thousandth of a millimetre (0,001 mm). Its unit symbol in the...
thin-walled or slightly strengthened, elongated phloem cells that conduct food substances.