It is essential that the spindle

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• Spindle pole body — The spindle pole body (SPB) is the microtubule organizing center in yeast cells, functionally equivalent to the centrosome. Unlike the centrosome the SPB does not contain centrioles. The SPB organises the microtubule cytoskeleton which plays many …   Wikipedia

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• Spindle apparatus — This article is about the cellular structure. For other uses, see Spindle (disambiguation). Micrograph showing condensed chromosomes in blue and the mitotic spindle in green during prometaphase of mitosis In cell biology, the spindle fibers are… …   Wikipedia

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• work, history of the organization of — Introduction       history of the methods by which society structures the activities and labour necessary to its survival. work is essential in providing the basic physical needs of food, clothing, and shelter. But work involves more than the use …   Universalium

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• Centrosome cycle — Centrosomes are the major microtubule organizing center (MTOC) in mammalian cells. [1] Failure of centrosome regulation can cause mistakes in chromosome segregation and is associated with aneuploidy. A centrosome is composed of two orthogonal… …   Wikipedia

• Countersink — A countersink is a conical hole cut into a manufactured object, or the cutter used to cut such a hole. A common usage is to allow the head of a countersunk bolt or screw, when placed in the hole, to sit flush with or below the surface of the… …   Wikipedia