Question

Formation of embryo directly from nucellus and integument is

• A. Adventitive polyembryony
• B. Apospory
• C. Apogamy
• D. Apomixis.

Answer 1

The correct option is A Adventitive polyembryony

•Polyembryony is the occurrence of more than one embryo in a single seed. In adventive polyembryony there is formation of extra embryos due to sporophytic budding. One or more sporophytic cells, either nucellus or integuments undergo stages of embryogeny and eventually develop into mature embryos.

•Apospory is the development of gametophyte from the sporophyte without the formation of spores.

•Apogamy is the development of sporophyte from the gametophyte without the fusion of gametes.

•Apomixis is a kind of asexual reproduction in which viable embryo is formed within the confines of seed coat without meiosis and syngamy.

So, the correct answer is A.