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Evolution

AIPMT 2005MCQEasy📈 Topic in 50% papers+4−1
Ques. 1AIPMT 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

Answer

(2) Gene flow does not occur between the populations of a species

Solution

A species is a group of individuals that can interbreed freely and produce fertile offspring.

Members of a species interbreed and variations occur among them, so options (1) and (4) are true; each species is also reproductively isolated from every other species, so option (3) is true.

As per NCERT, gene migration (gene flow) occurs when individuals move from one population to another of the same species and add new alleles to it.

∴ The statement 'gene flow does not occur between the populations of a species' is not true.

Answer: (2)

Keep practising — Evolution

Ques. 2AIPMT 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. 3AIPMT 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. 4AIPMT 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. 5AIPMT 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. 6AIPMT 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. 7AIPMT 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
Ques. 8AIPMT 2003

Convergent evolution is illustrated by:

  1. Bacterium and protozoan
  2. Rat and dog
  3. Dogfish and whale
  4. Starfish and cuttle fish
Ques. 9AIPMT 2003

Which one of the following sequences was proposed by Darwin and Wallace for organic evolution?

  1. Variations, natural selection, overproduction, constancy of population size
  2. Overproduction, constancy of population size, variations, natural selection
  3. Variations, constancy of population size, overproduction, natural selection
  4. Overproduction, variations, constancy of population size, natural selection
Ques. 10AIPMT 2003

Random genetic drift in a population probably results from

  1. Constant low mutation rate
  2. Interbreeding within this population
  3. Large population size
  4. Highly genetically variable individuals
Ques. 11AIPMT 2003

Industrial melanism is an example of :-

  1. Darkening of skin due to smoke from industries
  2. Defensive adaptation of skin against ultraviolet radiations
  3. Drug resistance
  4. Protective resemblance with the surroundings

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All NEET Zoology chapters
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Class 12Human ReproductionReproductive HealthEvolutionHuman Health and DiseaseBiotechnology: Principles and ProcessesBiotechnology and its ApplicationsBiology Experimental Skills