The diagram below that represents a microscopic structure observed during the process of cell division is Centromere
What is Centromere?
A chromosome's centromere is a restricted region that is essential for aiding in the cell's DNA division during mitosis and meiosis. It is, specifically, the area where the spindle fibers of the cell are attached.When a cell divides, the centromere connects two sister chromatids.
A short arm and a long arm are created on the chromatids by the connection of sister chromatids by this restricted region of the chromosome. Spindle fibers cling to the centromere through the kinetochore during mitosis.