Qstnid -I-13- Differentiate Between: (A) Hypocotyl And Epicotyl; (B) Coleoptile And Coleorrhiza; (C) Integument And Testa; (D) Perisperm And Pericarp. - 02: Sexual Reproduction In Flowering Plants

#13

Differentiate between:
(a) Hypocotyl and epicotyl;
(b) Coleoptile and coleorrhiza;
(c) Integument and testa;
(d) Perisperm and pericarp.

Ans : 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.

#13-a

Hypocotyl and epicotyl;

Ans :

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.

#13-b

Coleoptile and coleorrhiza;

Ans :

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.

#13-c

Integument and testa;

Ans :

Integument		Testa
	It is the outermost covering of an ovule. It provides protection to it.	It is the outermost covering of a seed.

#13-d

Perisperm and pericarp.

Ans :

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.