The random changes in the allele frequency occurring by chance is termed as

1. genetic variability

2. genetic drift

3. gene migration

4. mutation

Subtopic:  Sources of Variation: 2 | Sources of Variation |
 81%
From NCERT
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The first living organisms that appeard on the planet, according to the most accepted

view, were

1. anaerobic

2. aerobic

3. photosynthetic

4. none of the above

Subtopic:  Origin of Life: Chemical Evolution: 1 | Origin of Life |
 88%
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Which of these are considered most essential in the origin of life?

1. Enzymes

2. Nucleic acids

3. Carbohydrates

4. Proteins

Subtopic:  Origin of Life: Chemical Evolution: 1 | Origin of Life: Chemical Evolution: 2 | Origin of Life |
 72%
AIIMS - 2001
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Genetic drift operates only in

1. island population 

2. smaller population 

3. larger population

4. none of these.

Subtopic:  Sources of Variation: 2 | Sources of Variation |
 83%
AIIMS - 2001
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The cranial capacity was largest among the 

(a) Peking man               (b) Java ape man

(b) African man              (d) Neanderthal man

Subtopic:  Evolution of Homo Sapiens |
 83%
AIIMS - 2002
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The early-stage human embryo distinctly possesses

1. gills                             

2. gill slits

3. external ear (pinna)       

4. eyebrows                             

Subtopic:  Embryological Evidence of Evolution |
 83%
From NCERT
AIIMS - 2003
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A baby has been born with a small tail. It is a case exhibiting

1. retrogressive evolution

2. mutation 

3. atavism

4. metamorphosis.

Subtopic:  Concept of Organic Evolution: Evidence: 3 | Concept of Organic Evolution: Evidence |
 71%
AIIMS - 2004
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Potato and sweet potato 

(1) have edible parts which are homologous organs

(2) have edible parts which are analogous organs

(3) have been introduced in India from the same place

(4) are two species of the same genus.

 87%
From NCERT
AIIMS - 2004
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"Homo sapiens" implies

(1) Human race

(2) Human beings

(3) Modern man

(4) None of these

Subtopic:  Evolution of Homo Sapiens |
AIIMS - 2007
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Wings of pigeon, mosquito and bat show

1. divergent evolution 

2. atavism

3. convergent evolution 

4. all of these 

 85%
AIIMS - 2007
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