The endosperm of gymnosperm is
The endosperm of gymnosperm is
The correct option is D haploid
Gymnosperms lack a real or true endosperm. Between the 2 sperm nuclei, one of them degenerates. As a result, a real endosperm is missing. But, the nutrition providing tissue is essential for the embryo to grow and germinate. Such an endosperm of gymnosperms is a product of the pre-fertilisation tissue and is haploid.
During sexual reproduction, the gymnosperms form 2 sperm nuclei. Out of the 2, one degenerates. As a result, double fertilization doesn’t take place. The only viable and surviving male gamete fuses with the egg to form the zygote. There is no triple fusion to form a triploid endosperm. As a result, a real endosperm is missing.
In angiosperms, a wide variety is found in the ploidy of endosperms which may range from 2n - 15n. Ploidy above 2n can be considered as polyploidy. In Nuphar polysepala (a species of water lily), the endosperm is diploid because the male gamete fuses with only one maternal nucleus rather than two.
About 70% of the angiosperms have polyploid endosperms. The triploid endosperm is found in most of the flowering plants.
Gymnosperms lack a real or true endosperm. Between the 2 sperm nuclei, one of them degenerates. As a result, a real endosperm is missing. But, the nutrition providing tissue is essential for the embryo to grow and germinate. Such an endosperm of gymnosperms is a product of the pre-fertilisation tissue and is haploid.
During sexual reproduction, the gymnosperms form 2 sperm nuclei. Out of the 2, one degenerates. As a result, double fertilization doesn’t take place. The only viable and surviving male gamete fuses with the egg to form the zygote. There is no triple fusion to form a triploid endosperm. As a result, a real endosperm is missing.
In angiosperms, a wide variety is found in the ploidy of endosperms which may range from 2n - 15n. Ploidy above 2n can be considered as polyploidy. In Nuphar polysepala (a species of water lily), the endosperm is diploid because the male gamete fuses with only one maternal nucleus rather than two.
About 70% of the angiosperms have polyploid endosperms. The triploid endosperm is found in most of the flowering plants.
