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1.Sexual Reproduction in Flowering Plants
normal
A typical angiosperm embryo sac at maturity, is
A
$4- nucleate, 2 - celled$
B
$8 - nucleate, 7 -celled$
C
$4- nucleate, 4- celled$
D
$8 - nucleate, 4 - celled$
Solution
Polygonum type of embryo sac is the most common in angiosperms. It is $7 -celled$ and $8 nucleate$. The nuclei are arranged in such a way that three organized at micropylar end and form egg apparatus (one egg and two synergids), two nuclei migrate to centre and form polar nuclei in a single central cell and three nuclei at chalazal pole organized into antipodal cells.
Standard 12
Biology
