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a naturally occurring sequence of organisms from the various trophic levels that feed on each other.
cells that are formed during secondary growth by the vascular cambium ring just to the outside...
the practice and science of classification. This is the part of systematics that is only...
the cone-shaped region of the renal medulla, made up of the loops of Henlé and the collecting...
animals that live socially or in colonies and perform certain tasks for the good of the colony...
the end part of the digestive system that consists of the caecum, colon, rectum and anus.