The aggregate of processes that determine the size and composition of any population is called:

The impact of immigration on population density is

Which of the following is not an attribute of a population?

The absolute natality is . . . . . . realised natality.

Natality is

Ecological age groups of a population are:
$I.$ Pre-reproductive
$II.$ Reproductive
$III.$ Post-reproductive
$IV.$ Old-age group
$V.$ Adolescent age group
$VI.$ Infertile age group
Choose the correct option for the given statements.