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 $IV$
The formula for exponential population growthis
Natality refers to.
Which model is considered a more realistic one?
Give differences: Natality rate and Mortality rate
What is meant by growth models?