With respect to angiosperms, identify the incorrect pair from the following.
Vegetative cell of male gametophyte- n
Primary endosperm nucleus- 3n
Cells of nucellus of ovule- 2n
Correct answer: (a)
Solution: All the cells of the embryo sac are haploid except central cell which is first binucleate and then becomes diploid due to the fusion of polar nuclei. On the fusion with one of the male gametophyte (n), primary endosperm nucleus is formed which carries 3n. The three cells on the chalazal end of the embryo sac are called antipodal cells. They are the haploid vegetative cells of the embryo sac which may degenerate later. Thus, the correct answer is option A.