Reason of diversity in living being is

1. mutation 

2. gradual change

3. long term evolutionary change

4. short term evolutionary change

Theory of natural selection dwells on 

1. role of environment in evolution

2. natural selection acting on favourable variations

3. changes in gene complex resulting in heritable variations

4. None of the above

Darwin in his 'Natural Selection Theory' did not believe in any role of which one of the following in organic evolution?

1. Discontinuous variations

2. Parasites and predators as natural enemies

3. Survival of the fittest

4. Struggle for existence

Darwin's finches are an excellent example of 

1. adaptive radiation

2. seasonal migration

3. brood parasitism

4. connecting links

Origin of species' was written by 

1. Oparin

2. Weismann

3. Lamarck

4. Darwin