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

Which of the following is the formula for the logistic growth curve?

The natural growth rate of population is checked by certain factors. These are known as

Populations evolve to maximize their reproductive fitness,also called Darwinian fitness,with:

The birth and death rates of four countries are given below. Which one will have the least population growth rate?

$Country$	$Birth\, rate$ $/1000$	$Death\, rate$ $/1000$
$M$	$15$	$5$
$N$	$25$	$10$
$O$	$35$	$18$
$P$	$48$	$41$

Which one is correct for the logistic model of population growth?
$I.$ Population growth rate increases as the size of the population approaches the carrying capacity.
$II.$ All individuals have the same effect on population growth.
$III.$ There are unlimited natural resources.
$IV.$ As population increases,the competition goes on increasing.
Select the correct combination.