SELECT * FROM question_mgmt as q WHERE id=380 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=3 AND subId=7 AND chapterId=27 and ex_no='1' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 12th biology Sexual Reproduction in Flowering Plants differentiate between a hypocotyl and epicotyl

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

Answer:

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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