The rate at which new born individuals are joining the population by reproduction is known as

Which of the following factors contribute to an increase in population density?

Read the given statements carefully and select the correct ones:
$(1)$ Individuals of the same species together form a population.
$(2)$ Mortality is an important factor for population growth.
$(3)$ Natality (birth rate) is an important factor for the immediate increase in population size.
$(4)$ In commensalism,both organisms benefit from the interaction.

How is a population structured?

The geometric representation of age structure is known as:

Certain characteristic demographic features of developing countries are: