Define birth rate and death rate.
9 Likes
Birth rate — The number of live births per thousand persons in a year is called birth rate.
Death rate — The number of deaths per thousand persons in a year is called death rate.
Answered By
4 Likes
Define underpopulation.
What are the causes of underpopulation?
What will happen if the death rate in a year is less than the birth rate?
What is a population pyramid?