Fertilization is the fusion of male and female gamete, which takes place in the fallopian tube.
Discuss and point out the changes that occurs in the ovary after fertilization.

Fertilization is the fusion of male and female gamete, which takes place in the fallopian tube. Describe the changes that occurs in the uterus, if the ovum is not fertilized.

Which occurs after double fertilization?

Fertilization involving carrying of male gametes by pollen tube is

Though one ovum is produced from a primary oocyte it can result into a male or female child after fertilization. But in the case of spermatocyte though 4 sperms are produced only two of them can result to a female child after fertilization". Justify.

During sexual reproduction fertilization is an important process.But in most aquatic organisms like fishes,amphibians etc.external fertilization occur.In most terrestrial organisms internal fertilization is common. Point out the differences between external and internal fertilization.

Suggest the ART which may be successful in the following conditions. Fusion of gametes and zygote formation does not occur within the body of the female.

Raman is learning the post fertilization changes of an angiosperm embryo sac with the help of slides. He identified the egg nucleus and polar nuclei in the central cell with the help of his teacher. Help raman by giving the changes that take place with egg nucleus and polar nuclei.