For origin of life, which of the following is not a precondition, needed to be fullfilled by the protobionts under consideration ?
1. They should have been able to totally isolate themselve from the general environment
2. They should have been able to replicate
3. They should have acquired a perpetual source of energy 
4. Their replication should have been subject to error via mutation

Subtopic:  Origin of Life: Chemical Evolution: 2 | Origin of Life |
 53%
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Adenine was synthesized by Orgel, using the Miller apparatus, when he used the gas:

1. carbon dioxide

2. hydrogen cyanide

3. hydrogen sulfide

4. nitrogen

Subtopic:  Urey & Miller Experiment |
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Which of the following organisms alive today is likely to be most similar to the first life forms that evolved on the earth?

1. Methane producing bacteria

2. Cyanobacteria

3. Unicellular algae

4. Diatoms

 

Subtopic:  Definition & Types of Evolution |
 60%
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What provides new alleles and therefore underlies all other mechanisms that produce variation ?

1. Speciation 
2. Mutation 
3. Recombination 
4. Natural selection 

Subtopic:  Hugo De Vries Theory of Evolution |
 64%
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Subtopic:  Darwin's Theory |
 94%
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Which of the following is the most important precondition for speciation to occur?

(a) Reproductive isolation

(b) A crash of the population size

(c) Adaptive radiation

(d) Random mating

Subtopic:  Concept of Isolation |
 66%
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Subtopic:  Concept of Organic Evolution: Evidence: 2 | Concept of Organic Evolution: Evidence |
 68%
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The similarities between the eyes of an octopus and of a mammal are a result of:

1. Convergent evolution

2. Divergent evolution

3. Saltation

4. Retrograde evolution

Subtopic:  Concept of Organic Evolution: Evidence: 2 | Concept of Organic Evolution: Evidence |
 92%
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 |
 68%
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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 |
 61%
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