In the case of peppered moth (Biston betularia), the black-coloured form became dominant over the light-coloured form in England during industrial revolution. This is an example of

1. natural selection whereby the darker forms were selected

2. appearance of the darker coloured individuals due to very poor sunlight

3. protective mimicry

4. inheritance of darker colour character acquired due to the darker environment

 82%
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The first organisms were 

1. chemoautotrophs

2. chemoheterotrophs

3. autotrophs

4. eukaryotes

Subtopic:  Origin of Life: Chemical Evolution: 2 | Origin of Life |
 64%
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What was the most significant trend in the evolution of modern man (Homo sapiens) from his ancestors?

1. Shortening of jaws

2. Binocular vision

3. Increasing brain capacity

4. Upright posture

Subtopic:  Evolution of Homo Sapiens |
 73%
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Origin of species' was written by 

1. Oparin

2. Weismann

3. Lamarck

4. Darwin

Subtopic:  Darwin's Theory |
 74%
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Which of the following is the most important precondition for speciation to occur?

(1) Reproductive isolation

(2) A crash of the population size

(3) Adaptive radiation

(4) Random mating

Subtopic:  Concept of Isolation |
 62%
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The ultimate source of allelic variations is:

1. Genetic recombinations 

2. Mutation 

3. Genetic drift 

4. Natural selection 

Subtopic:  Hugo De Vries Theory of Evolution |
 54%
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If a new allele suddenly becomes very abundant in a population, most likely it is:

1. mutating rapidly

2. flowing with emigrants

3. strongly selected for

4. a product of assortative mating

Subtopic:  Genetic Basis of Adaptation |
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Genetic drift occurs when a few individuals of a species colonize an island. This phenomenon is :

(1) the bottleneck effect

(2) the founder effect

(3) assortative mating

(4) random mating 

Subtopic:  Difference Between Drift & Selection |
 76%
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The unit of evolution is now known to be the:
1. individual
2. family
3. population
4. species

Subtopic:   A BRIEF ACCOUNT OF EVOLUTION |
 56%
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The struggle for existence is a consequence of:

(1) Each organism leaving more organisms than needed to replace itself

(2) Innate competitive tendencies

(3) The inevitable difficulty of coping with climatic conditions

(4) Territories and dominance hierarchies

Subtopic:  Darwin's Theory |
 52%
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