Cell nucleus from maize preparing to divide

Cell nucleus from maize preparing to divide

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Caption: Transmission electron micrograph of a nucleus from a cell in the root cap of maize, Zea mays. The nucleus (central oval) is preparing to divide. The dark-stained nucleolus, normally a perfect oval, begins to disintegrate & disappears altogether during division. A second indication of division is the organisation of chromatin (dark blotches outside nucleolus). At division the chromatin organises into pairs of chromosomes, which are separated by a spindle apparatus into two equal parts, providing identical copies of the genetic material to the daughter cells. The cytoplasm outside the nucleus contains numerous cell bodies. Magnification: x860 at 35mm size.

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Keywords: botanical science, botany, cell division, cell nucleus, cells, chromatin, electron micrograph, mitosis, nucleolus, plant structure, tem, transmission

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