Name: Formation of New Species
Uploaded: 2019-07-19
Duration: 7 min 8 s
Description: New species are formed when their members are no longer able to reproduce with members of the parent species. See how new species are formed in this video.

Question

By taking industrial melanism as one example explain the concept of natural selection.

*The question statement was confusing and hence changed.*

Accepted Answer

The force of natural selection exerted on the population leads to the better adaptation of the individuals on a particular environmental condition and produce more number of offsprings in the population.

Natural selection always encourages certain genes (or traits) that assure highest degree of adaptive efficiency between population and its given environment. Industrial melanism is one of the best example for natural selection. This is an example of directional natural selection.

Industrial Melanism

During industrial revolution in England the frequency of melanic forms of species of Peppered Moth (Biston betularia) increased in polluted areas. Generally the moths are light coloured. This change in colour is known as "Industrial melanism". The change was presumed to be a result of natural selection since the melanic moths better matched the blackened tree trunks where they rest during day.

Light-coloured variety of peppered moth (Biston betularia) changes to darker variety (Biston carbonaria) by the process of industrial melanism which allows them to hide from predators. This change from a lighter colour to darker colour takes place due to mutation of the single Mendelian gene.

Hence, light coloured peppered moth, Biston betularia gets changed to its darker variety Biston carbonaria, due to impact of industrial carbon over melanin formation.

Era	Dominating group of animal
Cenozoic	....................................
....................	Reptiles
Palaeozoic	....................................
...................	Invertebrates

By taking industrial melanism as one example explain the concept of natural selection.

The question statement was confusing and hence changed.

Important Questions on Origin and Evolution of Life

Learn and Prepare for any exam you want !

By taking industrial melanism as one example explain the concept of natural selection. *The question statement was confusing and hence changed.*

Important Questions on Origin and Evolution of Life

Learn and Prepare for any exam you want !

By taking industrial melanism as one example explain the concept of natural selection.

The question statement was confusing and hence changed.