"scientist have not discovered WHY it happens"
It does not matter if scientists have discovered it or not, but the nuclear membrane disappears during PROPHASE
Hope this helped!!!
The nuclear envelope and nucleoli disappear during the prophase of mitosis.
the nuclear membrane breaks down during prophase
prometaphase
i think its anaphase
Anaphase
anaphas
Prophase
Prophase
metaphase
The nuclear membrane reforms around the nucleus during Telophase, the last phase of mitosis.
Prophase! Its one of the four processes of Mitosis.
Interphase Prophase Metaphase Anaphase Telephase.
The phase of mitosis that the nucleus forms is the prophase phase.
prometaphase
Prophase
metaphase
telophase
The nuclear membrane reforms around the nucleus during Telophase, the last phase of mitosis.
Phase 1- Mitosis begins. Chromosomes condense from long strands into rodlike structures. Phase 2- The nuclear membrane is dissolved. Paired chromatids align at the cell's equator. Phase 3- The paired chromatids separate and move to opposite sides of the cell. Phase 4- A nuclear membrane forms around each set of chromosomes, and the chromosomes decondense. Mitosis is complete.
Disappears in prophase and reappears in telophase.
Prophase! Its one of the four processes of Mitosis.
Prophase
The nuclear membrane fades during the prophase of mitosis or meiosis. This is the stage when the membrane begins to break down and disappear, allowing the chromosomes to become more condensed and accessible for cell division.
Interphase Prophase Metaphase Anaphase Telephase.
The phase of mitosis that the nucleus forms is the prophase phase.