Why endosperm in angiosperm is more efficient?
Solution : In angisperm , the cells of endosperm are triploid due to double fertilization. Thefore , they are more efficient in supplying food material to the developing embryo.Jun 27, 2022
Why is endosperm in angiosperm considered as more efficient?
Solution : In angisperm , the cells of endosperm are triploid due to double fertilization. Thefore , they are more efficient in supplying food material to the developing embryo.Jun 27, 2022
Why do angiosperms produce Endosperms?
In the case of double fertilization, which occurs in angiosperms, the primary nucleus fused with one of the nuclei of male gamete and produces zygote and secondary nucleus fuses with another nucleus of the male gametes and forms endosperm. Endosperm provides nourishment for the developing embryo.
Why is the endosperm of angiosperms triploid Class 11?
Endosperm is formed during the double fertilization. It is triploid because it is formed when one of the two sperm that is haploid enters inside the embryo sac & fuses with two polar nuclei (each polar nuclei is haploid). So the endosperm formed is triploid.
What is special about the endosperm in angiosperm reproduction?
endosperm, tissue that surrounds and nourishes the embryo in the seeds of angiosperms (flowering plants). In some seeds the endosperm is completely absorbed at maturity (e.g., pea and bean), and the fleshy food-storing cotyledons nourish the embryo as it germinates.
What makes the endosperm genetically unique?
2013, Tuncel et al. 2014). In addition, the endosperm expresses unique genes that have specialized functions in stress tolerance. Such endospermic proteins have been used to acquire stress tolerance when expressed in a heterologous organism (Amara et al.
What is special about fertilization in angiosperms?
1: Double fertilization: In angiosperms, one sperm fertilizes the egg to form the 2n zygote, while the other sperm fuses with two polar nuclei to form the 3n endosperm. This is called a double fertilization.Jun 8, 2022
Why the endosperm develops earlier than the zygote?
Endosperm develops before the embryo because the cells of the endosperm provide nutrition to the developing embryo. Q. Ex-albuminous (or) non-endospermic seeds do not consume endosperm during embryo development.
Why do most zygotes develop after certain amount of endosperm is formed?
Therefore, the correct answer to the question will be that most zygotes in angiosperms divide only when a certain amount of endosperm is formed because to divide the zygote need nutrients which it gets from the endosperm.
Why does the zygote in angiosperm start developing into embryo only after some endosperm is formed?
Once the division of Primary Endosperm Cell (PEC) is complete, there is sufficient availability of food for the embryo. In the absence of food, the zygote won't be able to get the necessary raw materials for making new cells. Hence, division of zygote begins only after the division of Primary Endosperm Cell (PEC).
What is the difference between endosperm and zygote?
The zygote is formed by the fusion of male gamete(n) and female gamete (n) called syngamy, so it is diploid in nature, and primary endosperm nucleus is formed by the fusion of secondary diploid nucleus (2n) with one of the male gamete(n), so it is triploid in nature.