Final answer:
In eukaryotes, the spindle breaks down during prophase and re-forms during telophase.
Step-by-step explanation:
In eukaryotes, the spindle breaks down during prophase and reforms during telophase. This is true. During prophase, the nuclear envelope breaks down, and the centrosomes move away from each other to opposite poles. The spindle fibers then start to form. In telophase, the spindle breaks down as new nuclear membranes form around the separated chromosomes.