InterviewSolution
Saved Bookmarks
InterviewSolution
| 1. |
Question : Differentiate between : (a) hypocotyl and epicotyl "" (b) coleoptile and coleorrhiza (c ) integument and testa "" (d) perisperm and pericarp |
|
Answer» Solution :(a) . Hypocotyl and epicotyl : The portion of embryonal AXIS below the level of cotyledons is called hypocotyl and the portion seen above the level of cotyledons is epicotyl. (b) Coleptile and coleorrhiza : In the embryonal axis of monocot just above the level of attachment of SCUTELLUM the epicotyl has a short apex and a few leaf primordia enclosed in a hollow foliar structure called the coleoptile . In monocot embryonal axis the lower end has the radicle and root cap enclosed in an undifferentiated sheath called coleorrhiza . ( c) Integumentand TESTA The covering of ovule is called integument . After fertilisation the integument becomes seed coat or testa . (d) Perisperm and pericarp The remnants of nucellus seen INSIDE the seed are called perisperm . The fruit WALL or ovary wall is called pericarp . |
|