Question

what is double fertilization describe the process with diagram from the stage of megaspore formation to zygote formation​

Answer 1

Answer:

1)the fertilization occurring twice is called double fertilization

2)In flowering plants out of the two Male gametes, one male gamete units with the egg cell to form embryo.

3)while the other unites with the secondary nucleus to from endosperm.

4)double fertilization involves two sperm cells;one fertilizers the egg cell to form the zygote, while the other fuses with the two polar nuclei that form the endosperm.

5)after fertilization, the fertilized ovule forms the become the fruit.

Answer 2

Double fertilization is the process of fusion of more than two gametic cells.

• Double fertilization consists of the fusion of one male gamete with a female ova and the fusion of the second male gamete with the secondary nucleus.

• Out of the two male gametes, one of the male gametes will undergo normal fertilization that involves the fusion of the male gamete with the female ova.
• This is known as syngamy or generative fertilization.

• The second male gamete will fuse with two haploid polar nuclei or diploid secondary nucleus. This results in the formation of triploid.

• This is known as triploid primary endosperm nucleus (PEN). eg. endosperm cell.