One of the reasons why the cell size occurs is that the main processes of cell physiology, such as flow through the membranes, depending on the size of the cells. As a result, the change in the volume of cells or surface area will be deeply influenced on the exchange stream, biosynthetic abilities and the exchange of nutrients. The second reason is that the main mechanism for dividing cells in eukaryota is based on microtubes both for the formation of mitotic spindle, and for the correct arrangement of it relative to the crust. Due to the dynamic properties of microtubules, they can explore a limited range of lengths, and if the cells become too large or too small, the mitotic apparatus may experience difficulties when working.
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