In reality, the distribution of population in India. is highly uneven. The uneven density of population in India is clear from the fact that in Arunachal. Pradesh the average number of population is only 13 persons per square kilometre, whereas it is 9,294. persons per square kilometre in Delhi as per 2001 census.
Fertile eggs have remnants of the male's sperm and a small layer of cells that could form the embryo. The proportion of these to the total egg is so small that it is impossible to detect chemical differences between fertile and infertile eggs.1.
So zygote is the first stage in the development of a new organism while embryo is the stage that follows next. 5. The process of zygote formation is fertilization while that of embryo is embryogenesis.