For the formation of tetrasporic embryosac, how many megaspore mother cells are required?

Step-by-step solution

- One megaspore divides meiotically to form four megaspores. - Sometimes meiotic division of the megaspore mother cell is not accompanied by cytokinesis and hence all the four haploid nuclei lie in a single cell called coeno-megaspore. - All the four nuclei of coeno-megaspore participate in the formation of the embryo sac. - This type of embryo sac is called as tetrasporic like in Peperomia. - The four haploid nuclei of coeno-megaspore undergo two successive mitotic divisions forming 16 nuclei.