Question
Differentiate between immigration and emigration.
| Immigration | | Emigration | |
| 1 | Immigration refers to the number of individuals aiming into a population from elsewhere during a given period of time. | 1 | Emigration refers to the number of individuals going out of a population to elsewhere during a given period of time. |
| 2 | It leads to an increase in population density. | 2 | It leads to a decrease in population density. |
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| VF and ET | a |
| b | Introduction of zygote/ embryo with 8 blastomeres into fallopian tube. |
| c | Introduction of ova of a donor into the fallopian tube. |
| d | Introduction of semen from the husband or healthy donor into the uterus. |