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regions or bundles of vascular tissue consisting of xylem and phloem separated by cambium.
cells that are formed during secondary growth by the vascular cambium ring just to the outside...
organisms that feed on dead organic matter and thereby release nutrients back into the soil.
organisms whose cells have a true nucleus and true organelles. These structures are not...
the deposition or build-up of silt and organic matter on the beds of rivers, dams etc.