Class 12BiologySexual Reproduction in Flowering PlantsThe Pistil, Megasporangium (ovule) and Embryo sac
EasyDefine/Explain the following terms:
$1.$ Micropyle
$2.$ Chalaza
$1.$ Micropyle
$2.$ Chalaza
(N/A) $(1)$ The integuments encircle the nucellus except at the tip,where a small opening called the micropyle is organized.
$(2)$ Opposite the micropylar end lies the chalaza,which represents the basal part of the ovule.
$(2)$ Opposite the micropylar end lies the chalaza,which represents the basal part of the ovule.
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$A$ $Drusa$ type of embryo sac is:
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View SolutionChoose the correct sentence$(s)$.
$(I)$ Nucleus of the functional megaspore divides meiotically to form two nuclei.
$(II)$ After the $8$-nucleate stage,cell walls are laid down leading to the organization of a typical female gametophyte.
$(III)$ The egg apparatus consists of two synergids and one egg cell.
$(IV)$ Three cells at the chalaza end are called antipodal cells.
$(I)$ Nucleus of the functional megaspore divides meiotically to form two nuclei.
$(II)$ After the $8$-nucleate stage,cell walls are laid down leading to the organization of a typical female gametophyte.
$(III)$ The egg apparatus consists of two synergids and one egg cell.
$(IV)$ Three cells at the chalaza end are called antipodal cells.
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View SolutionThe embryo sac is represented by .....
The megasporangium in angiosperms is usually . . . . . . .
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