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

Subtopic:  Examples of Chemical Evolution |
 88%
From NCERT
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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%
From NCERT
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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%
From NCERT
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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%
From NCERT
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Evolutionary convergence is the development of 

1. common set of characters in the group of different ancestry

2. dissimilar characters in closely related groups

3. common set of characters in closely related groups

4. random mating

Subtopic:  Concept of Organic Evolution: Evidence: 2 | Concept of Organic Evolution: Evidence |
 71%
From NCERT
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The finches of Galapagos islands provide an evidence in favour of

1. special creation

2. evolution due to mutation

3. retrogressive evolution 

4. biogeographical evolution 

Subtopic:  Concept of Organic Evolution: Evidence: 2 | Concept of Organic Evolution: Evidence |
 83%
From NCERT
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What is genetic equilibrium?

(1) When all the alleles of a gene are present in a population in equal frequencies

(2) When the number of heterozygotes in a population are equal to the number of either of the homozygote

(3) When the number of heterozygotes in a population are equal to the number of either of the homozygote

(4) When the frequency of particular genes or alleles remain constant in a population through generations

Subtopic:  Population Genetics |
 76%
From NCERT
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The presence of the monotremes and marsupials in the Australian continent can be explained by:

1.  Convergent evolution

2.  Adaptive radiation

3.  Punctuated equilibrium

4.  Gene flow 

Subtopic:  Concept of Organic Evolution: Evidence: 2 | Concept of Organic Evolution: Evidence |
 63%
From NCERT
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Which of the following would lead to deviation from Hardy-Weinberg equilibrium?

1. Random mating

2. Lack of mutations

3. No gene flow or gene migration

4. Natural selection

Subtopic:  Hardy Weinberg Law: 1 | Hardy Weinberg Law |
 60%
From NCERT
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The now extinct reptile group that evolved into mammals was:

1. Therapsids

2. Dinosaurs

3. Thecodants

4. Sauropsids

Subtopic:  Palentological Evidences of Evolution |
 52%
From NCERT
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