The aura can be in the form of prismatic colors, flashes of light, and sometimes stars. They usually last about 20 minutes and then go away. If these flashes or lines of light occur without a headache, it is called an ophthalmic migraine, or a migraine without a headache.
In gymnosperms and flowering plants, the megaspore is produced inside the nucellus of the ovule. During megasporogenesis, a diploid precursor cell, the megasporocyte or megaspore mother cell, undergoes meiosis to produce initially four haploid cells (the megaspores).
3. During what stage does the G1, S, and G2 phases happen? 4. During what phase of the cell cycle does mitosis and cytokinesis occur? 5. During what phase of the cell cycle does cell division occur? 6. During what phase of the cell cycle is DNA replicated? 7. During what phase of the cell cycle does the cell grow? 8. During what phase of the cell cycle does the cell prepare for mitosis? 9. How many stages are there in mitosis? 10. Put the following stages of mitosis in order: anaphase, prophase, metaphase, and telophase. 11. Put the following stages of the cell cycle in order: G2, S, G1, M. 12. Put the following in order: G2, G1, S, mitosis, cytokinesis. 13. Put the following actions in order: DNA replication, cell grows, cell division, cell ...