Question:
Differentiate between: (a) hypocotyl and epicotyl; (b) coleoptile and coleorrhiza; (c) integument and testa; (d) perisperm and pericarp.
Answer:
(a) Hypocotyl and epicotyl
|
Hypocotyl |
Epicotyl |
|
The portion of the embryonal axis, it is found below the cotyledon in a dicot embryo. |
The portion of the embryonal axis, it present above the cotyledon in a dicot embryo. |
|
It terminates at its lower end of the radicle. |
It terminates with the plumule. |
(b) Coleoptile and coleorhiza
|
Coleoptile |
Coleorhiza |
|
It is protective sheath which encloses the plumule in a monocot seed |
It is an undifferentiated sheath whch encloses the radicle and the root cap in a monocot seed. |
(c) Integument and testa
|
Integument |
Testa |
|
Integument is the outer cover of ovules. |
Testa is the outer protective cover of the seed coat. |
(d) Perisperm and pericarp
|
Perisperm |
Pericrap |
|
Perisperm is residual, persistent nucellus. |
Pericarp, wall of fruit developed from the wall of ovary. |
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