Question

Generation of the new species... explain

Answer 1

Evolution is the process of change in all forms of life over generations, and evolutionary biology is the study of how evolution occurs. Biological populations evolve through genetic changes that correspond to changes in the organisms' observable traits. Genetic changes include mutations, which are caused by damage or replication errors in an organism's DNA. As the genetic variation of a population drifts randomly over generations, natural selectiongradually leads traits to become more or less common based on the relative reproductive success of organisms with those traits.

Answer 2

The origin of new species from the existing one is called speciation. 

Generation of new species: When a population of a species splits into two populations, it cannot reproduce with each other. Then a new species is generated, for example, 

1. A huge population of beetles feed on bushes spread a wide mountain range. 

2. The beetle population becomes very large. 

3. Individual beetles feed mostly on a nearby bushes. 

4. In that huge population of beetles there will be sub-populations. There male and female beetles meet for reproduction to happen so most reproduction will be within these sub-populations. 

5. Occasionally a migrant beetle might go from one site to another or a beetle is picked up by a crow from one site and dropped in the other site. This migrant beetle will reproduce with the local population. 

6. Over generations genetic drift will accumulate different changes in each sub-population. Also natural selection may also operate differently in different geographic locations. 

7. Together the processes of genetic drift and natural selection will result in these two isolated sub-population of beetles becoming more and more different from each other. 

8. Eventually, members of these two groups will be incapable of reproducing with each other and two generations of beetles are being generated.