The correct sequence of stages in the evolution of modern man (Homo sapiens), is

(1) Homo erectus, Australopithecus, neanderthal man, cro-magnon man, modern man

(2) Australopithecus, Homo erectus, neanderthal man, cro-magnon man, modern man

(3) neanderthal man, Australopithecus, cro-magnon man, Homo erectus, modern man

(4) Australopithecus, neanderthal man, cro-magnon, Homo erectus, modern man

Subtopic:  Evolution of Homo Sapiens |
 85%
From NCERT
AIIMS - 2016
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Documented microfossils have been found that are as old as

(1) 2.5 billion years

(2) 3.5 billion years

(3) 1.5 billion years

(4) 2.5 billion years

Subtopic:  Biochemical Evidences |
AIIMS - 2017
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From the statements given below, which one most likely represents an example of disruptive selection.

I. Industrial melanism in peppered moth.

II. Population of butterflies that are either all yellow or all blue.

III. Population of rabits that evolves more body fat in response to a cold climate.

IV. Population of wrens that evolves to be smaller at sexual maturity in response to predation pressure.

V. Very tall and very short pine trees being removed from a population by herbivorey.

(1) Only II                             

(2) II and III

(3) Only IV                             

(4) III and IV        

Subtopic:  Natural Selection |
 51%
AIIMS - 2017
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The best description of natural selection is 

(1) the survival of the fittest

(2) the struggle for existence 

(3) the reproductive success of the members of a population best adapted to the environment

(4) a change in the proportion of variation within a population 

Subtopic:  Darwin's Theory |
 66%
From NCERT
AIIMS - 2017
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Reproduction isolation in sympatric speciation develops without a 

(1) Geographic barrier

(2) Barrier to gene flow

(3) Change in chromosome number

(4) Barrier to mating

Subtopic:  Concept of Speciation |
 58%
AIIMS - 2016
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Which of the following sets do not have homologous organs? 

(1) Mouth parts of cockroach and butterfly

(2) Wings of butterfly and bird

(3) Wings of mosquito and butterfly 

(4) Forelegs of horse and paddles of whale

Subtopic:  Concept of Organic Evolution: Evidence: 1 | Concept of Organic Evolution: Evidence |
 70%
From NCERT
AIIMS - 2016
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Which of the following is the relatively most accurate method for dating fossils?

(1) Pottasium-argon method

(2) Uranium-lead method

(3) Electron-spin resonance method

(4) Radio-carbon method

Subtopic:  Palentological Evidences of Evolution |
 55%
AIIMS - 2015
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At a particular locus, frequency of 'A' allele is 0.6 and that of 'a' is 0.4. What would be the frequency of heterozygotes in a randomly mating population of equilibrium ?

(1) 0.16

(2) 0.36

(3) 0.48

(4) 0.24

Subtopic:  Hardy Weinberg Law: 1 | Hardy Weinberg Law: 2 | Hardy Weinberg Law |
 81%
AIIMS - 2014
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Speciation of sympatric species is due to

(1) geographic isolation

(2) reproductive isolation

(3) isolation/separation

(4) migration

Subtopic:  Concept of Speciation |
 59%
AIIMS - 2013
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Flame cells and Malpighian tubules are the analogous organ in 

(1) insects and arthropods respectively 

(2) arthropods and echinodermates respectively

(3) helminths and arthropods with other insect respectively

(4) arthropds and other insect with helminths respectively

 72%
AIIMS - 2013
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