In fact, seed is formed by the changes taking place in ovule during embryonic development and endosperm development after fertilization. As a result of these changes, ovule gets transformed into seed, integuments into seed coat. The outer integument forms testa and inner integument forms tegmen of seed. Funicle forms stalk of seed. Hilum, micropyle, Raphae, chalaza remain as such. Nucellus is almost used during development but in some plants like black pepper, remnants of nucellus exists as membrane called perisperm.