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Evolution

AIPMT 2005MCQMedium📈 Topic in 38% papers+4−1
Ques. 1AIPMT 2005

There are two opposing views about origin of modern man. According to one view Homo erectus in Asia were the ancestors of modern man. A study of variation of DNA however suggested African origin of modern man. What kind of observation of DNA variation could suggest this?

  1. Variation only in Asia and no variation in Africa
  2. Similar variation in Africa and Asia
  3. Greater variation in Africa than in Asia
  4. Greater variation in Asia than in Africa

Answer

(3) Greater variation in Africa than in Asia

Solution

Mutations accumulate in DNA with time, so the oldest population of a species shows the greatest genetic (DNA) variation, while populations that migrated out later carry only a part of the original variation (founder effect).

Hence greater DNA variation in Africa than in Asia shows that modern man lived longest in Africa and spread from there.

∴ This supports the African origin of modern man (as per NCERT, Homo sapiens arose in Africa and moved across continents).

Answer: (3)

Keep practising — Evolution

Ques. 2AIPMT 2005

Which one of the following phenomena supports Darwin's concept of natural selection in organic evolution?

  1. Prevalence of pesticide resistant insects
  2. Development of organs from 'stem' cells for organ transplantation
  3. Production of 'Dolly', the sheep by cloning
  4. Development of transgenic animals
Ques. 3AIPMT 2005

Which of the following is the relatively most accurate method for dating of fossils?

  1. Radio-carbon method
  2. Uranium-lead method
  3. Potassium–argon method
  4. Electron-spin resonance method
Ques. 4AIPMT 2005

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 random mating population at equilibrium?

  1. 0.48
  2. 0.24
  3. 0.36
  4. 0.16
Ques. 5AIPMT 2005

Which of the following is not true for a species ?

  1. Variations occur among members of a species
  2. Gene flow does not occur between the populations of a species
  3. Each species is reproductively isolated from every other species
  4. Members of a species can interbreed
Ques. 6AIPMT 2004

Diversification in plant life appeared

  1. due to long periods of evolutionary changes
  2. due to abrupt mutations
  3. suddenly on earth
  4. by seed dispersal
Ques. 7AIPMT 2004

Presence of gills in the tadpole of frog indicates that

  1. fish were amphibious in the past
  2. fish evolved from frog-like ancestors
  3. frog will have gills in future
  4. frog evolved from gilled ancestors
Ques. 8AIPMT 2004

Age of fossils in the past was generally determined by radio-carbon method and other methods involving radioactive elements found in the rocks. More precise methods, which were used recently and led to the revision of the evolutionary periods for different groups of organisms include -

  1. Electron spin resonance (ESR) & fossil DNA
  2. Study of carbohydrates/proteins in fossils
  3. Study of the conditions of fossilization
  4. Study of carbohydrates/proteins in rocks
Ques. 9AIPMT 2004

What kind of evidence suggested that man is more closely related with chimpanzee than with other hominoid apes ?

  1. Evidence from fossil remains and the fossil mitochondrial DNA alone
  2. Evidence from DNA extracted from sex chromosomes, autosomes
  3. Comparison of chromosome morphology only
  4. Evidence from DNA from sex chromosomes only
Ques. 10AIPMT 2004

According to Oparin, which one of the following was not present in the primitive atmosphere of the earth ?

  1. Water vapour
  2. Oxygen
  3. Methane
  4. Hydrogen
Ques. 11AIPMT 2004

Diversification in plant life appeared

  1. By seed dispersal
  2. Due to abrupt mutations
  3. Due to long periods of evolutionary changes
  4. Suddenly on earth

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All NEET Zoology chapters
Class 11Animal KingdomStructural Organisation in AnimalsBiomolecules (Biology)Digestion and AbsorptionBreathing and Exchange of GasesBody Fluids and CirculationExcretory Products and their EliminationLocomotion and MovementNeural Control and CoordinationChemical Coordination and Integration
Class 12Human ReproductionReproductive HealthEvolutionHuman Health and DiseaseBiotechnology: Principles and ProcessesBiotechnology and its ApplicationsBiology Experimental Skills