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).
Copy of What types of cells and organism... Mitiosis undergo cells and organisms that can reproduce asexually and create indentical copies of their DNA. Meiosis uses organisms that rely on sexual reproduction however the process of mitosis is still needed for growth. Copy of Copy of What types of cells and ... Mitiosis undergo cells and organisms that can reproduce asexually and create indentical copies of their DNA. Meiosis uses organisms that rely on sexual reproduction however the process of mitosis is still needed for growth.