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

 66%
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Which one of the following describes correctly the homologous structures?

1. Organs appearing only in embryonic stage and disappearing later in the adult

2. Organs with anatomical similarities, but performing different functions

3. Organs with anatomical dissimilarities, but performing same functions

4. Organs that have no function now, but had an important function in ancestors

Subtopic:  Embryological Evidence of Evolution |
 90%
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'Continuity of germplasm' theory was given by 

1. De Vries 

2. Weismann

3. Darwin

4. Lamarck

Subtopic:  Germ Plasm Theory |
 70%
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Which one of the following amino acid was not found to be synthesised in Miller's experiment? 

1. Aspartic acid

2. Glutamic acid

3. Alanine

4. Glycine

Subtopic:  Urey & Miller Experiment |
 56%
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Two geographical regions separated by high mountains are 

1. Oriental and Austrailian

2. Palaearctic and Oriental

3. Nearctic and Palaearctic

4. Neotropical and Ethiopian

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Correct order is [1991]
1. Palaeozoic       Archaeozoic      Coenozoic
2. Archaeozoic       Palaeozoic       Proterozoic
3. Palaeozoic      Mesozoic       Coenozoic
4. Mesozoic      Archaeozoic       Proterozoic

Subtopic:  Palentological Evidences of Evolution |
 74%
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Homologous organs are

1. wings of insects and bat

2. gills of fish and lungs of rabbit

3. pectoral fins of fish and fore limbs of horse

4. wings of grasshopper and crow

Subtopic:  Concept of Organic Evolution: Evidence: 1 | Concept of Organic Evolution: Evidence |
 62%
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Evolution of different species in a given area starting from a point and spreading to other geographical areas is known as 

1. adaptive radiation

2. natural selection

3. migration

4. divergent evolution

Subtopic:  Natural Selection |
 81%
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Which was absent in the atmosphere at the time of origin of life?

1. NH3

2. H2   

3. O2   

4. CH4

Subtopic:  Origin of Life: Chemical Evolution: 1 | Origin of Life |
 89%
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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

Subtopic:  Darwin's Theory |
 59%
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