Question

Compare, giving reasons, the J-shaped and S-shaped models of population growth of a species.

Answer 1

The J-shaped of growth curve for the population growth in a species indicates the exponential form of growth. There is rapid increase in the growth rate due to the favorable factors.

For S- shaped, there is sigmoid curve obtained. This is when there are three phases in the growth of the organism as lag phase, exponential phase and stationary phase. This is the condition when the species is adapting to an environment like an artificial growth medium and then subsequently the nutrients are used up which decreases the growth of the population.