Here's a breakdown of why:
* Prophase: This is the first and longest stage of mitosis. During prophase, the following key events occur:
* Chromatin Condensation: The loose, thread-like chromatin in the nucleus condenses into visible, distinct chromosomes.
* Nuclear Envelope Breakdown: The nuclear membrane, which encloses the nucleus, begins to fragment and dissolve.
* Centriole Movement: Centrioles, which are involved in spindle fiber formation, migrate to opposite poles of the cell.
* Spindle Fiber Formation: Microtubules begin to form the spindle fibers, which will attach to the chromosomes and help move them during mitosis.
Let me know if you have any other questions about mitosis!
