The process by which organisms with different evolutionary history evolve similar

phenotypic adaptations in response to a common enviroment challenge, is called 

1. natural selection 

2. convergent evolution 

3. non-random evolution 

4. adaptive radiation 

Subtopic:  Concept of Organic Evolution: Evidence: 2 | Concept of Organic Evolution: Evidence |
 64%
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NEET - 2013
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The tendency of population to remain in genetic equilibrium may be disturbed by 

1. random mating

2. lack of migration 

3. lack of mutations

4. lack of random mating

Subtopic:  Hardy Weinberg Law: 1 | Hardy Weinberg Law: 2 | Hardy Weinberg Law |
 57%
NEET - 2013
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The eyes of Octopus and eyes of cat show different patterns of structure, yet they

perform similar function. This is an example of

1. homologous organs that have evolved due to convergent evolution

2. homologous organs that have evolved due to divergent evolution

3. analogous organs that have evolved due to convergent evolution

4. analogous organs that have evolved due to divergent evolution

Subtopic:  Concept of Organic Evolution: Evidence: 1 | Concept of Organic Evolution: Evidence: 2 | Concept of Organic Evolution: Evidence |
 88%
From NCERT
NEET - 2013
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What is true about the isolated small tribal populations?

(1) There is a decline in population as boys marry girls only from their own tribe.

(2) Hereditary diseases like colourblindness do not spread in the isolated population.

(3) Wrestlers who develop strong body muscles in their life time pass this character on to their progeny.

(4) There is no change in population size as they have a large gene pool.

Subtopic:  Concept of Isolation |
NEET - 2008
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Among the human ancestors the brain size was more than 1000 cc in:

1. Homo neanderthalensis

2. Homo erectus

3. Ramapithecus

4. Homo habilis

 

Subtopic:  Evolution Prior to Ape Man: 1 | Evolution Prior to Ape Man |
 83%
From NCERT
NEET - 2007
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Industrial melanism as observed in peppered moth proves that :

(1) the true black melanic forms arises 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 of the moth has no selective adavantage either in polluted industrial area or non-polluted area

(4) Melanism is a pollution- generated feature.

Subtopic:  Genetic Basis of Adaptation |
NEET - 2007
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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

Subtopic:  Darwin's Theory |
 73%
From NCERT
NEET - 2007
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If the mean and the median pertaining to a certain character of a population are of the

same value, the following is most likely to occur:

1. a normal distribution

2. a bi-modal distribution

3. a T-shaped curve

4. a skewed curve 

 

Subtopic:  Population Genetics |
NEET - 2007
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Jurassic period of the Mesozoic era is characterized by:

1. gymnosperms are dominant plants and first birds appear

2. radiation of reptiles and origin of mammal-like reptiles

3. dinosaurs become extinct and angiosperms appear

4. flowering plants and first dinosaurs appear

Subtopic:  Palentological Evidences of Evolution |
NEET - 2006
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The slow process by which new types of organism arise from existing forms by genetic

variation is called

1. Hybridisation

2. Mutation

3. Evolution

4. Transformation

Subtopic:  Definition & Types of Evolution |
 77%
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