Question

Identify the wrong statements regarding post fertilization development.

• A. The ovary wall develops into pericarp.
• B. The outer integument of the ovule develops into tegmen.
• C. The fusion nucleus (triple nucleus) develops into endosperm.
• D. The ovule develops into seed.
• E. The ovary develops into fruit.

Answer 1

The correct option is B The outer integument of the ovule develops into tegmen.

After fertilization, the ovule matures into seeds and ovary into fruits. The process of fertilization is unique in angiosperms because it involves syngamy between male and female gametes and triple fusion between a male gamete and a secondary nucleus. Because two fertilization events are involved, it is called as double fertilization. The second fertilization is a fusion between three haploid nucleus (two forming a diploid secondary nucleus and one haploid male nucleus). Hence the secondary fertilization event is called as Triple fusion. It gives rise to a triploid primary endosperm nucleus (PEN). PEN later on gives rise to triploid endosperm. The seed coat forms from the two integuments or outer layers of cells of the ovule, which derive from tissue from the mother plant, the inner integument forms the tegmen and the outer forms the testa. The seed coats of some monocotyledon plants, such as the grasses, are not distinct structures, but are fused with the fruit wall to form a pericarp.