Differentiate between:
(a) Hypocotyl and epicotyl
(b) Coleoptile and coleorrhiza
(c) Integument and testa
(d) Perisperm and pericarp
Differentiate between
(a)
|
Hypocotyl |
Epicotyl |
|
|
1. |
The portion of the embryonal axis which lies below the cotyledon in a dicot embryo is known as the hypocotyl. |
The portion of the embryonal axis which lies above the cotyledon in a dicot embryo is known as the epicotyl. |
|
2. |
It terminates with the radicle. |
It terminates with the plumule. |
(b)
|
Coleoptile |
Coleorrhiza |
|
|
|
It is a conical protective sheath that encloses the plumule in a monocot seed. |
It is an undifferentiated sheath that encloses the radicle and the root cap in a monocot seed. |
(c)
|
Integument |
Testa |
|
|
|
It is the outermost covering of an ovule. It provides protection to it. |
It is the outermost covering of a seed. |
(d)
|
Perisperm |
Pericarp |
|
|
|
It is the residual nucellus which persists. It is present in some seeds such as beet and black pepper. |
It is the ripened wall of a fruit, which develops from the wall of an ovary. |
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