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

  • A
    $\frac{dN}{dt} = rN \left(\frac{K - N}{K}\right) \quad \frac{dN}{dt} = rN$
  • B
    $\frac{dN}{dt} = rN \quad \frac{dN}{dt} = rN \left(\frac{K - N}{K}\right)$
  • C
    $\frac{dN}{dt} = rN \quad \frac{dN}{dt} = rN \left(\frac{N - K}{K}\right)$
  • D
    $\frac{dN}{dt} = rN \left(\frac{N - K}{K}\right) \quad \frac{dN}{dt} = rN$

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Population growth is reduced by environmental resistance. This phase is known as:

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:

The birth and death rates of four countries are given below. Which one will have the least population growth rate?
$Country$$Birth\, rate$ $/1000$$Death\, rate$ $/1000$
$M$$15$$5$
$N$$25$$10$
$O$$35$$18$
$P$$48$$41$

In the logistic growth equation $dN/dt = rN[(K-N)/K]$,'$r$' represents :-

The human population growth curve of today is:

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