Final answer:
During prophase of meiosis, the membrane surrounding the nucleus breaks apart.
Step-by-step explanation:
During prophase of meiosis, the nuclear envelope starts to dissociate into small vesicles, and the membranous organelles fragment and disperse towards the periphery of the cell. The nucleolus disappears and the centrosomes begin to move to opposite poles of the cell. This is when the membrane surrounding the nucleus breaks apart.