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).
What cells are involved in mitosis? All somatic (body) cells at one point or another are involved in mitosis. The only cells that do not undergo mitosis, are the sex cells, sperm and ovum cells. Every body cell â¦from liver to nerve cells undergo mitosis at least once.