$A$ given habitat has enough resources to support a maximum possible number of a species. This limit beyond which no further growth is possible is called its . . . . . . for that species.

The magnitude of $r$-value (intrinsic rate of natural increase) for the Norway rat is:

Given below are two statements: one is labelled as Assertion $A$ and the other is labelled as Reason $R$.
Assertion $A$: The logistic growth model of populations is considered more realistic than the exponential growth model.
Reason $R$: Resources are finite.
In the light of the above statements, choose the most appropriate answer from the options given below:

If in a population,the number of organisms added by $B + I$ is less than the number of organisms lost by $D + E$ at time $t$,but the population size $N$ at time $t+1$ is $10$ times greater than the initial population size,which of the following characteristics can be inferred?

The population growth curves are given below. Identify the equations for $P$ and $Q$.

If a population growing exponentially doubles in size in $3$ years,what is the intrinsic rate of increase $(r)$ of the population?