Question

Evolution of a new species can occur through
Statement 1: genetic and chromosomal mutation.
Statement 2: recombination and natural selection.
Statement 3: reproductive isolation.
Statement 4: hybridisation.
Which among the above statements is/are correct?

• A. 1, 2 and 3
• B. 1 and 2 only
• C. 2 and 3 only
• D. 1, 2, 3 and 4

Answer 1

The correct option is D 1, 2, 3 and 4

Change in all forms of life over generations is termed as evolution. Many theories and postulations regarding evolution have been made from time to time. These theories of evolution are based on the idea that all species are related and gradually changed over time. The prime source of evolution is variation and variation can occur by means of genetic or chromosomal mutation, recombination, hybridisation, reproductive isolation etc. Mutation is the ultimate source of variation and variation is the fuel of evolution, so all these processes are interconnected, and which makes a living organism better fitted with the environment and can consequently lead to the formation of a new species as well, which is called speciation.
So, all of the above processes may occur in a living being for adaptation and lead to evolution of new species.