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Evolution · Question 84

AIPMT 2005MCQEasy📈 Topic in 75% papers+4−1
1

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

Answer

(1) Prevalence of pesticide resistant insects

Solution

As per NCERT, excess use of herbicides, pesticides, etc., has only resulted in selection of resistant varieties in a much lesser time scale — evolution by anthropogenic action.

⇒ Insects with resistance genes survive the pesticide and leave more offspring, so the resistant type becomes common: this is natural selection.

⇒ Stem-cell organs, cloning (Dolly) and transgenic animals are man-made techniques, not natural selection.

Answer: (1)

AIPMT 2005

Keep practising — Evolution

2

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
AIPMT 2005
3

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
AIPMT 2005
4

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
AIPMT 2005
5

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
AIPMT 2004
6

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
AIPMT 2004
7

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
AIPMT 2004
8

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
AIPMT 2004
9

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
AIPMT 2004
10

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
AIPMT 2004
11

Convergent evolution is illustrated by:

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

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