The country having a negative population growth rate is:

Which type of population growth curve is expected for the human population in the coming century?

Under which of the following conditions is the logistic population growth curve obtained?

The environmental resistance means

$A$: Environmental resistance operates to slow down the exponential phase in logistic population growth.
$R$: $A$ crash phase does not occur in this population.

In the exponential growth equation $N_{t}=N_{0} e^{rt}$,$e$ represents :