Which one of the following pair of items correctly belongs to the category of organs mentioned against it?

1.  Thorn of Bougainvillea and tendrils of Cucurbita – Analogous organs

2.  Nictitating membrane and blind spot in human eye – vestigial organs

3.  Nephridia of earthworm and Malpighian tubules of cockroach - Excretory organs

4.  Wings of honey bee and wings of crow - Homologous organs

Subtopic:  Definition & Types of Evolution | Theory of Evolution & Lamarckism |
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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:  Darwin's Theory | Summary of Darwin's Theory |
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Which one of the following is not a living fossil?

1. King crab

2. Sphenodon

3. Archaeopteryx

4. Peripatus

Subtopic:  Concept of Speciation | Genetic Basis of Adaptation |
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Variations caused by mutation, as proposed by Hugo de Vries, are:

1. small and directionless

2. random and directional

3. random and directionless

4. small and directional

Subtopic:  Hugo De Vries Theory of Evolution |
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A gene locus has two alleles A, a. If the frequency of dominant allele A is 0.4, then what will be the frequency of homozygous dominant, heterozygous and homozygous recessive individuals in the population?

1.  0.16 (AA); 0.36 (Aa); 0.48 (aa)

2.  0.36 (AA); 0.48 (Aa); 0.16 (aa)

3.  0.16 (AA); 0.24 (Aa); 0.36 (aa)

4.  0.16 (AA); 0.48 (Aa); 0.36 (aa)

Subtopic:  Hardy Weinberg Law: 1 | Hardy Weinberg Law: 2 | Hardy Weinberg Law |
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In a species, the weight of a newborn ranges from 2 to 5 kg. 97% of the newborns with an average weight between 3 to 3.3 kg survive whereas 99% of the infants born with weights from 2 to 2.5 kg or 4.5 kg to 5 kg die. Which type of selection process is taking place?

1. Cyclical selection

2. Directional selection

3. Stabilizing selection

4. Disruptive selection

Subtopic:  Types of Natural Selection |
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Match the hominids with their correct brain size:

Column I Column II
(a) Homo habilis  (i) 900 cc
(b) Homo neanderthalensis (ii) 1350 cc
(c) Homo erectus  (iii) 650-800 cc
(d) Homo sapiens (iv) 1400 cc

Select the correct option.

Options: (a) (b) (c) (d)
1. (iv) (iii) (i) (ii)
2. (iv) (i) (iv) (ii)
3. (iii) (ii) (i) (iv)
4. (iii) (iv) (i) (ii)
Subtopic:  Evolution Prior to Ape Man: 1 | Evolution Prior to Ape Man: 2 | Evolution Prior to Ape Man |
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For the stability of the organic compounds, Oparin opined that probably:
1. UV radiation never reached the surface of the primeval Earth

2. the primitive Earth was in a molten state

3. the primitive Earth atmosphere was reducing rather than oxidizing

4. plenty of energy sources were available for chemical reactions to occur

 

Subtopic:  Origin of Life: Chemical Evolution: 1 | Origin of Life |
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Both Charles Darwin and A.R.Wallace were influenced by the:
1. writings of J.B.S.Haldane on the origin of life
2. findings of Urey and Miller experiments
3. findings on the Galapagos Islands
4. essay on human population by T.R.Malthus

Subtopic:  Darwin's Theory |
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Which of the following pairs of organs do not represent analogous organs?
1. Eye of an octopus and eye of a mammal
2. Flippers of penguin and flippers of dolphin
3. Wings of bat and forelimbs of humans
4. Wings of birds and wings of butterfly

Subtopic:  Concept of Organic Evolution: Evidence: 1 | Concept of Organic Evolution: Evidence |
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