Eukaryotic cells that have cell organelles and nucleus bounded by a membrane but do not have a cell wall is called an animal cell.
The structure that produces spindle fibers is called centrioles.
During the cell division steps, centrioles produce spindle fibers in the centrosome.
During metaphase and anaphase of mitosis and meiosis spindle fibers are formed that helps in separating sister chromatids.
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