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Evolution · Question 39

NEET 2016 (Phase 1)MCQEasy📈 Topic in 75% papers+4−1
1

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

Answer

(3) Flipper of Whale

Solution

The wing of a bird is a modified forelimb.

⇒ As per NCERT, the forelimbs of whales, bats, cheetah and human share similar anatomical structure (humerus, radius, ulna, carpals, metacarpals and phalanges) — they are homologous.

∴ The flipper of a whale (forelimb) is homologous to the wing of a bird.

∵ Wing of a moth is analogous, a shark's dorsal fin is not a limb, and a rabbit's hindlimb is not a forelimb.

Answer: (3)

NEET 2016 (Phase 1)

Keep practising — Evolution

2

Analogous structures are a result of :

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

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)
4

Genetic drift operates in

  1. slow reproductive population
  2. large isolated population
  3. non-reproductive population
  4. small isolated population
NEET 2016 (Phase 2)
5

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

  1. pq
  2. p2
  3. 2pq
  4. q2
NEET 2016 (Phase 2)
6

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)
7

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)
8

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
9

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
10

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
11

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

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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