Question

The origin of new species from pre-existing species is

• A. Isolation
• B. Speciation
• C. Genetic variation
• D. Reproductive isolation

Answer 1

The correct option is B Speciation

• The evolutionary process by which new biological species arise is called speciation.
• The speciation not only brings phenotypic changes but also genotypic changes which causes a variation in the gene pool.
• Isolation is the segregation of different populations into smaller units by a certain mechanism so as to prevent interbreeding among them.
• Genetic variation is the difference in DNA among individuals or the differences between populations.

So, the correct answer is option B.