The fundamental units of all living things are cells. There are many billions of cells in a human body. They give the body structure, absorb nutrients from meals, turn those nutrients into energy, and perform certain tasks.
Chromosomes condense as the nuclear membrane starts to dissolve during the first stage of cell division, or ?
The nuclear membrane disintegrates, the nucleolus vanishes, and the chromosomes condense during prophase.
The nuclear membrane vanishes and the chromosomes position themselves halfway between the centrioles during metaphase. Each doubled chromosome's centromere is joined to the centrioles, which are located on the polar opposite sides of the cell, via spindle fibers that resemble threads.
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