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a small, corky pore or narrow line on the surface of the stem of a woody plant that allows the interchange of gases between the interior tissue and the surrounding air.
regions or bundles of vascular tissue consisting of xylem and phloem separated by cambium.
a method of ordering the age of different fossils, relative to each other, without working out...
the condition caused by a severe shortage of both energy and nutrients in the diet over an...