Illustrate formation of a species with the help of an example where individual are very different from each other and are capable of reproducing among themselves
Answers
There is a population of red beetles living in a mountain area covered with green bushes. Various sub-population in the large-population exists in the neighbourhood. Individuals of a sub-population reproduce sexually among themselves and numerous variations accumulate in these sub-populations of red beetles.
There may be some reproduction among these sub-populations. If a beetle from one sub-population strays into other’s area and some individuals from one sub-population may be carried by predators to the area of other sub-population, then random reproduction takes place. It may lead to migration of genes from one sub-population to other.
If the sub-populations are isolated due to the presence of river between them:
(i) Variation will accumulate in isolated sub-population.
(ii) Over a period of generation, the sub-populations would get very different from each other due to the processes of genetic drift and natural selection and they will not be able to reproduce themselves.
The amalgamation of certain species is one that happens only on the microbiological level and hence it is amazing to see how two different beings come together and then reproduce and make a unique being which is one of the epitomes of evolution of every living being.
This is one of the most fascinating things about the living creatures.