What is the ploidy of the Primary Endosperm Nucleus $(PEN)$ in angiosperms?
- AHaploid
- BDiploid
- CTriploid
- DTetraploid
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$R$: It is required to form the definitive nucleus as nutritive tissue.
$R$: It is required to form the definitive nucleus as nutritive tissue.
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The term $Xenia$ refers to the effect of foreign pollen on which of the following?
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