Which one of the following is not the consequences of the population explosion

$A $: Under unlimited resource condition a population can show a exponential growth curve.
$R$ : $A $maximum possible number of individuals can always be supported when enough resources are available
 

The standard of living is very badly affected by

Which one is right for logistic model for population growth?

$I.$ Population growth rate increases as the size of population approaches the carrying capacity

$II.$ All individual have same effect on population growth

$III.$ There are unlimited natural resources

$IV.$ As population increases the competition goes on increasing

Select the correct combination

Natality refers to.

Capacity of the environment in which a species can get maximum nutrition is called