The tiger census in our national parks and tiger reserves is often based on:

What is true about the isolated small tribal populations?

An organization formed by individuals of the same species is called.....

If a population has just been established in an ecosystem,which of the following factors will have the greatest impact?

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.

In the hierarchy of biological organization,a population is formed by the aggregation of..........