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Evolution · Question 81

AIPMT 2005MCQEasy📈 Topic in 12% papers+4−1
1

Which one of the following experiments suggests that simplest living organisms could not have originated spontaneously from non-living matter?

  1. Meat was not spoiled, when heated and kept sealed in a vessel
  2. Larvae could appear in decaying organic matter
  3. Microbes appeared from unsterilized organic matter
  4. Microbes did not appear in stored meat

Answer

(1) Meat was not spoiled, when heated and kept sealed in a vessel

Solution

As per NCERT, Louis Pasteur showed by careful experimentation that life comes only from pre-existing life.

⇒ In pre-sterilised (heated) flasks kept sealed, life did not come from 'killed yeast', whereas in flasks open to air new living organisms arose.

⇒ Likewise, meat that is heated (microbes killed) and kept sealed (no new microbes enter) does not spoil.

∴ This experiment shows that even the simplest organisms do not arise spontaneously from non-living matter.

Answer: (1)

AIPMT 2005

Keep practising — Evolution

2

De Vries gave his mutation theory on organic evolution while working on -

  1. Althaea rosea
  2. Oenothera lamarckiana
  3. Pisum sativum
  4. Drosophila melanogaster
AIPMT 2005
3

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
AIPMT 2005
4

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
AIPMT 2005
5

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
6

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
7

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
8

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
9

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
10

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
11

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

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