Reptilian ancestors of the mammals were the :-
1. Therapsids
2. Thecodonts
3. Pterosaurs
4. Plesiosaurs
 

Subtopic:   A BRIEF ACCOUNT OF EVOLUTION |
 76%
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Given below is the representative evolutionary history of vertebrates through geological periods. A, B, C, and D respectively are:

 

A B C D
1. Dinosaurs Thecodonts Therapsids Pelycosaurs
2.  Dinosaurs Therapsids Thecodonts Pelycosaurs
3. Pelycosaurs Therapsids Thecodonts Dinosaurs
4.  Therapsids Dinosaurs Pelycosaurs Thecodonts
Subtopic:  Palentological Evidences of Evolution |
 74%
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Karn & Penrose showed that birth weight follows a normal distribution, that mortality for newborns is greater for those either under-or over-weight, and that the mean birth weight (7 lbs) coincides with that showing minimum mortality. The type of natural selection operating here is shown by the graph :

1. (a)

2. (b)

3. (c)

4. Both (a) and (b)

Subtopic:  Natural Selection |
 60%
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The following two plants exhibit :

1. Analogous organs

2. Vestigial organs

3. Rudimentary organs

4. Homologous organs

Subtopic:  Concept of Organic Evolution: Evidence: 1 | Concept of Organic Evolution: Evidence |
 89%
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In the apparatus of Urey and Miller experiment, the gases [G] contained in the flask are :

 

1. Methane, Carbon dioxide, Ammonia and Water vapour
2. Methane, Hydrogen cyanide, Ammonia and Water vapour
3. Methane, Ammonia, Hydrogen and Water vapour
4. Carbon dioxide, Oxygen, hydrogen and ammonia 

Subtopic:  Urey & Miller Experiment |
 66%
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Lamarck's theory of evolution is also called

1. Theory of special creation

2. Inheritance of acquired characters

3. Survival of the fittest

4. None of these

Subtopic:  Theory of Evolution & Lamarckism |
 87%
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Industrial melanism is an example of

(1) Neo Darwinism

(2) Natural selection

(3) Mutation

(4) Neo Lamarckism

Subtopic:  Natural Selection |
 88%
From NCERT
NEET - 2015
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Which is the most common mechanism of genetic variation in the population of a sexually reproducing organism?

(1) Transduction

(2) Chromosomal aberrations

(3) Genetic drift

(4) Recombination

Subtopic:  Sources of Variation: 1 | Sources of Variation: 2 | Sources of Variation |
 66%
NEET - 2015
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What is common to whale, seal and shark?

(1) Seasonal migration

(2) Thick subcutaneous fat

(3) Convergent evolution

(4) Homeothermy

Subtopic:  Definition & Types of Evolution |
 55%
NEET - 2007
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Artificial selection to obtain cows yielding high milk output represents

1. Stabilising selection as it stabilizes this character in the population
2. Directional as it pushes the mean of the character in one direction
3. Disruptive as it spills the population into two, one yielding higher output and the other lower output
4. Stabilizing followed by disruptive as it stabilizes the population of producing higher yielding cows
Subtopic:  Additional Theories of Darwin |
 57%
NEET - 2017
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