Reason of diversity in living being is

1. mutation 

2. gradual change

3. long term evolutionary change

4. short term evolutionary change

Among the human ancestors the brain size was more than 1000 cc in

1. Homo neanderthalensis

2. Homo erectus

3. Ramapithecus

4. Homo habilis

Which of following is closest relative of man?

1. Chimpanzee 

2. Gorilla

3. Orangutan

4. Gibbon

When two species of different geneology come to resemble each other as a result of adaptation, the phenomenon is termed

1. divergent evolution

2. micro-evolution

3. co-evolution

4. convergent evolution

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

Which one of the following options gives one correct example each of convergent evolution and divergent evolution?

Parallelism is 

1. adaptive divergence

2. adaptive divergence of widely separated species

3. adaptive convergence of widely different species

4. adaptive convergence of closely related groups

The concept of chemical evolution is based on 

1. crystallization of chemicals

2. interaction of water, air, and clay under intense heat

3. effect of solar radiation on chemicals

4. the possible origin of life by the combination of chemicals under suitable environmental conditions

Industrial melanism as observed in peppered moth proves that

1. the true black melanic forms arise by a recurring random mutation

2. the melanic form of the moth has no selective advantage over lighter form in industrial area

3. the lighter form moth has no selective advantage either in polluted industrial area or non-polluted area

4. melanism is a pollution generated feature.

One of the important consequences of geographical isolation is 

1. no change in the isolated fauna

2. preventing speciation

3. speciation through reproductive isolation

4. random creation of new species