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Zoology - Evolution Practice Question Paper

12th Standard EM

    Reg.No. :


Time : 01:00:00 Hrs
Total Marks : 40
    5 x 1 = 5
  1. The age of fossils can be determined by


    electron microscope


    weighing the fossils


    carbon dating


    analysis of bones

  2. Origin of fishes occurred in ___________ period









  3. Founder's effect is related to


    Genetic drift


    Gene mutation




    Artificial selection

  4. Which one of the following brings about evidence for convergent evolution?


    Homologous structure


    Analogous structure


    Vestigial organs


    Atavistic organs

  5. Genetic drift leads to




    Bottle neck effect





  6. 1 x 1 = 1
  7. (a) In sympatric speciation, both new and ancestral species continue to inhabit the same geographical region.
    (b) Phenotypic plasticity in the ability of single genotype to produce more than one phenotype.
    (c) Mass extinction of animals happened due to the elevation of CO2 level.
    (d) Mass extinction is often referred to as K-T extinction.


    (c) Mass extinction of animals happened due to the elevation of CO2 level.

  8. 1 x 2 = 2
  9. Assertion: Natural selection will help to produce variations
    Reason: The variations will help the organism in times of disasters.
    (a) A is in the and R is the covered the explanation of A
    (b) A and R right but R is not the correct separation of A
    (c) A is correct R is false
    (d) Both A & B are false

  10. 1 x 2 = 2
  11. (a) Haeckel
    (b) Mendel
    (c) Wallace
    (d) Lamarck

  12. 1 x 2 = 2
  13. Sudden appearance of vestigial organs in highly enlarged organisms __________

  14. 1 x 1 = 1
  15. (A) Vestigial organ - Four chambered heart in reptiles
    (B) Analogous structure - wings of birds
    (C) Homologous structure - bones in the forelimbs veributes
    (D) Atavistic organ - tail in human body

    (a) A only
    (b)  B and C
    (c) C and D
    (d) C only

  16. 4 x 2 = 8
  17. How does Hardy-Weinberg’s expression (p2+2pq+q2=1) explain that genetic equilibrium is maintained in a population? List any four factors that can disturb the genetic equilibrium.

  18. What is the view ofNeo Lamarckism?

  19. What is paleontology?

  20. Write a brief note on Homo sapiens with respect to evolution.

  21. 3 x 3 = 9
  22. How does Mutation theory of De Vries differ from Lamarck and Darwin’s view in the origin of new species.

  23. What is divergent evolution?

  24. Organs which are of no use to the organism is called as vestige. Name any four vestigial organs that can be noticed in your body.

  25. 2 x 5 = 10
  26. How does Neanderthal man differ from the modern man in appearance?

  27. Explain about the objections to Darwinism.


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