Question - Vedclass

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1.Sexual Reproduction in Flowering Plants

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Embryo sac consists of

A

One egg cell

B

Two synergids

C

Three antipodal and two polar nuclei

D

All of the above

Solution

An ideal embryo sac contains $7-$ cells and $8$ -nuclei. $3$ cells are present at the micropylar end and form egg apparatus, mid of which forms egg cell and rest two lateral form synergids. One cell present in the centre of embryo sac, known as central cell and contains two nuclei and rest three cells are present at chalazal end for antipodal cells

Std 12

Biology

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Similar Questions

The cells in embryo sac which act as haustoria are

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Choose correct sentence.

$(I)$ Nucleus of the functional megaspore divides meiotically to form two nuclei.

$(II)$ After $8$ nucleate stage, cell walls are laid down leading to organization of typical female gametophyte

$(III)$ The egg apparatus, consists of two synergids and one egg cell.

$(IV)$ Three cells are at the chalaza end are called antipodal cells.

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Definations / Explanation :

$1.$ Micropyle

$2.$ Chalaza

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Synergids are

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Female gametophyte of angiospermic plants is represented by

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