Which of the following is correct
$I.$ In a population, birth rate and death rate refer to per capita births and death respectively
$II.$ In nature, we rarely find isolated single individuals of any species
$III.$ The size of population for any species is stable phenomena
$IV.$ Ecological effects of any factors on a population growth are generally reflected in its size/population density
$I$ and $II$
$II$ and $III$
$I, II$ and $III$
$I, II$ and $IV$
Maximum survival and reproductive capacity shown by a population under optimal environmental conditions is called
The equation of Verhulst-Pearl logistic growth is $\frac{\mathrm{dN}}{\mathrm{dt}}=\mathrm{rN}\left[\frac{\mathrm{K}-\mathrm{N}}{\mathrm{K}}\right]$.
From this equation, $\mathrm{K}$ indicates:
In a population, the condition at which the rate of addition of new members is more than the rate of individuals lost indicates
Which option is correct for curve $a$ and $b$ ?
$[Image]$
Equation for equation for Type of Type of
Curve $(a)$ curve $(b)$ curve $(a)$ curve $(b)$
Comment on the growth curve given below.