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Describe the changes that occur during prophase in an animal cell

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Final answer:

During prophase, changes occur in an animal cell such as the breakdown of the nuclear envelope, dispersal of Golgi apparatus and endoplasmic reticulum, disappearance of the nucleolus, movement of centrosomes to opposite poles, extension of microtubules, and coiling of sister chromatids.

Step-by-step explanation:

During prophase, several changes occur in an animal cell:

  1. The nuclear envelope starts to break into small vesicles.
  2. The Golgi apparatus and endoplasmic reticulum fragment disperse to the cell's periphery.
  3. The nucleolus disappears.
  4. The centrosomes move to opposite poles of the cell.
  5. The microtubules extend between the centrosomes, pushing them farther apart.
  6. The sister chromatids coil tightly and become visible under a light microscope.
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