If skin cells divide by meiosis, they would produce cells with half the chromosome number. This would disrupt normal repair and the cut would not heal properly.
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Cells have many small mitochondria instead of one large one to increase surface area. More surface area allows faster energy production, efficient reactions and better distribution of energy throughout the cell.
The first stage of cell division is interphase, where the cell prepares for division by growing and duplicating its DNA before entering the active stages of division.
Yes, onion root tip cells are visible under a microscope. They are not similar in structure because they are at different stages of cell division, showing structural differences.
A diagram should show nucleus as a dark round body, ER as a network around it and rod-shaped mitochondria and chloroplasts. Label all parts clearly to represent the structure of a cell.