Question 5 - Assertion Reasoning questions (MCQ) - Chapter 9 Class 10 - Heredity and Evolution

Assertion (A): Speciation is the process of formation of a new species from a pre-existing one.

Reason (R): Mutation plays a role in speciation.

Answer:

Speciation is the process of formation of new species from pre-existing ones. 

Factors which can lead to speciation are:  

1. Genetic drift  
2. Mutation/ Drastic change in the genes or DNA  
3. Natural selection  
4. Geographical isolation 

Thus,

• The assertion is true.
• The reason is true.

So, the correct answer is (a).