What is immigration ?

The Process of migration within a country is known as immigration

Immigrantion is the movement of non-native people into a country in order to settle there. the part of a port, airport, etc where government employees examine the passports, visas, etc of foreign nationals entering the country.

the unequal cytoplasmic division that  results  in  one egg  and three polar bodies ensures that a fertilized  egg has  ample nutrients  forits journey  to  the uterus.