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(b) coleoptile and coleorrhiza
|
Coleoptile |
Coleorrhiza |
|
Epicotyl has a shoot apex and a few leaf primordial enclosed in hollow foliar structure called Coleoptile. |
At the lower end of embyonal axis, it has the radical and root cap enclosed in undifferentiated sheath called coleorrhiza. |
(c) integument and testa
|
Integument |
Testa |
|
They are the protective covering of ovules. |
It is the outer seed coat. |
|
Except micropylar end it encircles the complex ovule. |
It protects the young embryo because of its hardness. |
(d) perisperm and pericarp.
|
Perisperm |
Pericarp |
|
Residual persistent nucellus is called perisperm. |
It is fruit’s wall which developed from wall of ovary. |
|
It is single layered. |
It may have three layers i.e., exocarp, mesocarp and endocarp. |
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Posted on 11th Nov 2021 06:59:18 in
Question 13) Differentiate between:
(a)hy pocotyl and epicotyl;
(b)coleoptile and coleorrhiza;
(c)integument and testa;
(d)perisperm and pericarp.
Answer
(a) hy pocotyl and epicotyl
|
Hypocotyl |
Epicotyl |
|
It is a cylindrical portion below the level of cotyledons. |
The portion of embryonal axis above the level of cotyledons. |
|
It terminates as its lower end in radical or root tip. |
It terminates with the plumule or stem tip. |
(b) coleoptile and coleorrhiza
|
Coleoptile |
Coleorrhiza |
|
Epicotyl has a shoot apex and a few leaf primordial enclosed in hollow foliar structure called Coleoptile. |
At the lower end of embyonal axis, it has the radical and root cap enclosed in undifferentiated sheath called coleorrhiza. |
(c) integument and testa
|
Integument |
Testa |
|
They are the protective covering of ovules. |
It is the outer seed coat. |
|
Except micropylar end it encircles the complex ovule. |
It protects the young embryo because of its hardness. |
(d) perisperm and pericarp.
|
Perisperm |
Pericarp |
|
Residual persistent nucellus is called perisperm. |
It is fruit’s wall which developed from wall of ovary. |
|
It is single layered. |
It may have three layers i.e., exocarp, mesocarp and endocarp. |
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