Question

Which type of polyembryony involves derivatives of two or more megaspore mother cells (MMCs)?

Options

• Sporophytic Cell Activation

• Multiple Embryo Sac Formation

• Cleavage Polyembryony

• Adventive (Nucellar) Polyembryony

Answer 1

Multiple embryo sac formation polyembryony involves more than one embryo sac developing within the same ovule, with each embryo sac arising from derivatives of two or more megaspore mother cells (MMCs). Casuarina is a characteristic example, where the development of multiple megaspore lineages leads to the formation of multiple embryos within a single ovule.