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Evolution · Question 41

NEET 2016 (Phase 1)MCQMedium📈 Topic in 12% papers+4−1
1

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

Answer

(2) Both A and B are correct

Solution

A: The primitive atmosphere was reducing and had no free oxygen. ⇒ The first organisms were non-green (heterotrophic) and anaerobic — correct.

B: The first autotrophs obtained energy by oxidising inorganic substances (chemoautotrophs) and did not release oxygen; oxygen-releasing photosynthesis appeared later with cyanobacteria-like forms — correct.

∴ Both A and B are correct.

Answer: (2)

NEET 2016 (Phase 1)

Keep practising — Evolution

2

Genetic drift operates in

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

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

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

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)
5

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)
6

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
7

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
8

Variation in gene frequencies within populations can occur by chance rather than by natural selection. This is referred to as :

  1. Genetic drift
  2. Genetic load
  3. Genetic flow
  4. Random mating
NEET 2013
9

The process by which organisms with different evolutionary history evolve similar phenotypic adaptations in response to a common environmental challenge is called :

  1. Convergent evolution
  2. Adaptive radiation
  3. Natural selection
  4. Non-random evolution
NEET 2013
10

The eye of octopus and eye of cat show different patterns of structure, yet they perform similar function. This is an example of :

  1. Homologous organs that have evolved due to divergent evolution
  2. Analogous organs that have evolved due to convergent evolution
  3. Homologous organs that have evolved due to convergent evolution
  4. Analogous organs that have evolved due to divergent evolution
NEET 2013
11

Random unidirectional change in allele frequencies that occurs by chance in all populations and especially in small populations is known as :-

  1. Genetic drift
  2. Migration
  3. Mutation
  4. Natural selection
NEET 2013 (Karnataka)

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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