Which of the following is not true about Homo sapiens?

(1) Arose in 75000- 10000 years ago

(2) Cave art developed about 18000 years ago

(3) Agriculture came around 10000 years ago

(4) Modern man's skull resembles more with adult chimpanzee than baby chimpanzee.

Subtopic:  Evolution of Homo Sapiens |
 82%
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Some of the marsupials of Australia resemble equivalent placental mammals that live in similar habitats on other continents. This is an example of:

1.Convergent evolution2.Divergent evolution
3.Saltatory evolution4.Adaptive radiation

Subtopic:  Concept of Organic Evolution: Evidence: 2 | Concept of Organic Evolution: Evidence |
 65%
From NCERT
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A population of an animal is hunted down to only 20 organisms. Later the number is restored to 10,000 organisms, but the variations in this population are highly reduced. This is called:

1. Founder Effect

2. Bottleneck effect

3. Edge effect

4. Heterosis

Subtopic:  Sources of Variation: 2 | Sources of Variation |
 61%
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What is the half life of U238, the radioactive isotope of uranium?

(1) 4500 years

(2) 4.5 million years

(3) 45 million years

(4) 4.6 billion years

Subtopic:  Palentological Evidences of Evolution |
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The earliest known members of the horse family belong to the genus:

1. Hyracotherium                                                             

2. Equus

3. Mesohippus                                                                  

4. Merychippus

Subtopic:  Palentological Evidences of Evolution |
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In a population of red (dominant) and white flowers, the frequency of red flowers is 91 %. What is the frequency of the red allele?

(1) 9 %

(2) 30 %

(3) 91 %

(4) 70 %

Subtopic:  Hardy Weinberg Law: 1 | Hardy Weinberg Law: 2 | Hardy Weinberg Law |
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 ............... operates to eliminate intermediate phenotypes.

(1) Directional selection

(2) Disruptive selection

(3) Stabilizing selection

(4) Random chance

Subtopic:  Natural Selection |
 62%
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Many bacteria are now resistant to penicillin, because:

(1) penicillin causes gene mutations, some of which are beneficial

(2) previously resistant forms survived and reproduced better than non-resistant forms

(3) the hospital environment inhibits competition among bacteria

(4) penicillin triggers the synthesis of resistant proteins

Subtopic:  Sources of Variation: 1 | Sources of Variation |
 73%
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A change in allele frequency within a population, over a succession of generations, is called:

(1) microevolution, or adaptive evolution

(2) macroevolution, or speciation

(3) coevolution

(4) phylogenetic evolution

Subtopic:  Hardy Weinberg Law: 1 | Hardy Weinberg Law: 2 | Hardy Weinberg Law |
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A plant population that reproduces by self - pollination is an extreme example of :

(1) the bottleneck effect

(2) the founder effect

(3) rapid gene flow

(4) assortative mating

Subtopic:  Sources of Variation: 1 | Sources of Variation: 2 | Sources of Variation |
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