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 |
 74%
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%
From NCERT
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Which of the following statements is incorrect?

1. Life processes are consequences of reactions that occur in an organism.

2. Living organisms are made of inorganic and organic compounds.

3. Life comes from pre-existing life.

4. Genes are not responsible for the stability or changeability of species.

Subtopic:  Other Theories of Origin of Life |
 85%
From NCERT
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Study of fossils is called

1. ecology                     

2. angiology

3. exobiology                 

4. none of these

Subtopic:  Palentological Evidences of Evolution |
 86%
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The 'devonian period' is considered to be as

1. age of fishes

2. age of amphibians

3. age of reptiles

4. age of mammals.

Subtopic:  Palentological Evidences of Evolution |
 65%
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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 |
 82%
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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