The process by which individuals are included into a population is known as
Immigration
Emigration
Migration
$(a)$ and $(b)$ both
In the population curve of India, nowadays the number of
Which of the following is correct for $r$-selected species?
If natality is represented by $-B$
If mortality is represented by $-D$
If immigration is represented by $-I$
If emigration is represented by $-E$
If population density is represented by $-N$
Then population density at time $t+1$ is represented by
In the exponential growth equation $\mathrm{N}_{\mathrm{t}}=\mathrm{N}_{0} \mathrm{e}^{\mathrm{rt}}$, $e$ represents :
Certain characteristic demographic features of developing countries are