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Differentiate between:

(a) Hypocotyl and epicotyl;

(b) Coleoptile and coleorrhiza;

(c) Integument and testa;

(d) Perisperm and pericarp.

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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...
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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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