Which one of the following sequences was proposed by Darwin and Wallace for organic evolution?                                                                                
1. Variations, natural selection, overproduction, constancy of population size

2. Overproduction, variations, constancy of population size, natural selection 

3. Variations, constancy of population size, overproduction, natural selection

4. Overproduction, constancy of population size, variations, natural selection

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

The struggle for existence is a consequence of:

(1) Each organism leaving more organisms than needed to replace itself

(2) Innate competitive tendencies

(3) The inevitable difficulty of coping with climatic conditions

(4) Territories and dominance hierarchies

Darwin finches on the Galapagos Islands are an excellent example of:

1. Disruptive selection

2. Inheritance of acquired characters

3. Adaptive radiation

4. Convergent evolution

Darwin believed that certain parts of the body get larger and more complex through the generations because they :

1. are used more extensively than other parts 

2. contribute to greater reproductive success

3. are pre-determined to do so 

4. are most similar to God's perfection 

Select the correct statement from the following :

1. Darwinian variations are small and directionless

2. fitness is the end result of the ability to adapt and gets selected by nature

3. all mammals except whales and camels have seven cervical vertebrae

4. mutations are random and directional