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Evolution · Question 37

NEET 2018MCQEasy📈 Topic in 12% papers+4−1
1

According to Hugo de Vries, the mechanism of evolution is

  1. multiple step mutations
  2. saltation
  3. phenotypic variations
  4. minor mutations

Answer

(2) saltation

Solution

As per NCERT, Hugo de Vries, based on his work on evening primrose, brought forth the idea of mutations — large differences arising suddenly in a population.

He believed that it is mutation which causes evolution, and not the minor variations (heritable) that Darwin talked about.

Mutations are random and directionless, and de Vries called this single-step large mutation saltation.

Answer: (2)

NEET 2018

Keep practising — Evolution

2

Artificial selection to obtain cows yielding higher milk output represents :

  1. directional as it pushes the mean of the character in one direction
  2. stabilizing followed by disruptive as it stabilizes the population to produce higher yielding cows.
  3. disruptive as it splits the population into two, one yielding higher output and the other lower output.
  4. stabilizing selection as it stabilizes this character in the population.
Out of syllabusNEET 2017
3

Which of the following structures is homologous to the wing of a bird ?

  1. Wing of a Moth
  2. Dorsal fin of a Shark
  3. Flipper of Whale
  4. Hindlimb of Rabbit
NEET 2016 (Phase 1)
4

Analogous structures are a result of :

  1. Divergent evolution
  2. Convergent evolution
  3. Stabilizing selection
  4. Shared ancestry
NEET 2016 (Phase 1)
5

Following are the two statements regarding the origin of life - Of the above statements which one of the following options is correct ?

  1. Both A and B are false
  2. Both A and B are correct
  3. B is correct but A is false
  4. A is correct but B is false
NEET 2016 (Phase 1)
6

Genetic drift operates in

  1. slow reproductive population
  2. large isolated population
  3. non-reproductive population
  4. small isolated population
NEET 2016 (Phase 2)
7

In Hardy-Weinberg equation, the frequency of heterozygous individual is represented by

  1. pq
  2. p2
  3. 2pq
  4. q2
NEET 2016 (Phase 2)
8

The chronological order of human evolution from early to the recent is

  1. Ramapithecus Homo habilis Australopithecus Homo erectus
  2. Australopithecus Ramapithecus Homo habilis Homo erectus
  3. Ramapithecus Australopithecus Homo habilis Homo erectus
  4. Australopithecus Homo habilis Ramapithecus Homo erectus
NEET 2016 (Phase 2)
9

Which of the following is the correct sequence of events in the origin of life ? I. Formation of protobionts II. Synthesis of organic monomers III. Synthesis of organic polymers IV. Formation of DNA-based genetic systems

  1. II, III, I, IV
  2. II, III, IV, I
  3. I, II, III, IV
  4. I, III, II, IV
NEET 2016 (Phase 2)
10

According to Darwin, the organic evolution is due to -

  1. Reduced feeding efficiency in one species due to the presence of interfering species
  2. Competition within closely related species
  3. Intraspecific competition
  4. Interspecific competition
NEET 2013
11

The tendency of population to remain in genetic equilibrium may be disturbed by :

  1. lack of random mating
  2. random mating
  3. lack of migration
  4. lack of mutations
NEET 2013

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