Reproduction is synonymous with growth in

The proper maintenance of the internal environment is known as

$A$ true species consists of a population that is:

Which of the following two are known as the twin characteristics of growth?
$(i)$ Irreversible increase in mass $(ii)$ Uncontrolled $\&$ Repeated Cell Division $(iii)$ Increase in number of individuals $(iv)$ Reproduction

Two plants can be concluded to belong to the same species if they:

$X$ - No non-living objects exhibit metabolism.
$Y$ - Metabolic reactions can be demonstrated outside the body in a cell-free system.