- AStamen consist of anther and filament.
- BAnther consists of stamen and filament.
- CAnther is generally monothecous.
- DDithecous anther consists of two pollen sacs.
Explanation:
Stamen, the male reproductive part of a flower.
In all but a few extant angiosperms, the stamen consists of a long slender stalk, the filament, with a two-lobed anther at the tip.
The anther consists of four saclike structures (microsporangia) that produce pollen for pollination.
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$I.$ Organs which are different in basic structure and origin but performs similar functions are called analogous organ
$II.$ Organs with different to basic structure and origin but perform similar functions are called homologous organs
$III.$ Homologous organs lead to convergent evolution
$IV.$ Analogous organ leads to divergent evolution
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