The two key concepts of Darwinian theory of evolution are
1. Branching descent and natural selection
2. Saltation and Founder effect
3. Chance mutation and anthropogenic action
4. Adaptive radiation and genetic mutation

Who concluded that existing living forms share similarities to varying degrees not only among themselves but also with life forms that existed millions of years ago?

1. Charles Lyell 

2. Charles Darwin

3. Lamarck

4. A. Weismann

Natural selection is the survival of fittest, which of the
following most precisely describe the survival of fittest?
1. The physical strength of organism.
2. How many fertile offspring is produced by an
organism.
3. Capability to tolerate environmental extremities.
4. How long they survive.

Diversification in plant life appeared:

1. Due to abrupt mutations

2. Suddenly on earth

3. By seed dispersal

4. Due to long periods of evolutionary changes 

In replica-plate experiment some bacteria able to grow in penicillin containing medium due to

1. Natural selection 

2. Reproductive isolation

3. Genetic drift 

4. Crossing over

Both Charles Darwin and A.R.Wallace were influenced by the:
1. writings of J.B.S.Haldane on the origin of life
2. findings of Urey and Miller experiments
3. findings on the Galapagos Islands
4. essay on human population by T.R.Malthus

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 

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

The best description of natural selection is
1. the survival of the fittest
2. the struggle for existence
3. the reproductive success of the members of a
population best adapted to the environment
4. a change in the proportion of variations within
a population

The correct statement about the nature of evolution and natural selection is

1. Evolution is a process while natural selection is the end result of a process which is unknown.

2. Natural selection is a process while evolution is the end result of a process which is unknown.

3. Both evolution and natural selection are the end results of a process which is unknown.

4. It is still unclear whether evolution and natural selection are process or end results of unknown processes.