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Question
Which among the following is not a haploid structure in angiosperms?
Which among the following is not a haploid structure in angiosperms?
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Solution
The correct option is B Endosperm
Endosperm in angiosperms is triploid (3n) since it is formed by the fusion of three nuclei. Fusion of one male gamete (n) with the diploid secondary nucleus (2n) (formed by fusion of two haploid polar nuclei) results in the formation of triploid (3n) primary endosperm nucleus (PEN). PEN divides and develops into a triploid nutritive tissue, the endosperm.
The embryo sac represents the female gametophyte in angiosperms. The embryo sac is formed from the haploid megaspore. Hence all the cells inside the embryo sac are haploid. It is a 7 celled structure. Three antipodals, two synergids,one egg cell and one large central cell.
Endosperm in angiosperms is triploid (3n) since it is formed by the fusion of three nuclei. Fusion of one male gamete (n) with the diploid secondary nucleus (2n) (formed by fusion of two haploid polar nuclei) results in the formation of triploid (3n) primary endosperm nucleus (PEN). PEN divides and develops into a triploid nutritive tissue, the endosperm.
The embryo sac represents the female gametophyte in angiosperms. The embryo sac is formed from the haploid megaspore. Hence all the cells inside the embryo sac are haploid. It is a 7 celled structure. Three antipodals, two synergids,one egg cell and one large central cell.
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