Zoology - Organisms and Population Model Question Paper

12th Standard EM

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Biology

Time : 01:30:00 Hrs
Total Marks : 50
    6 x 1 = 6
  1. All populations in a given physical area are defined as

    (a)

    Biome

    (b)

    Ecosystem

    (c)

    Territory

    (d)

    Biotic factors

  2. Competition between species leads to

    (a)

    Extinction

    (b)

    Mutation

    (c)

    Amensalism

    (d)

    Symbiosis

  3. Which of the following is an r-species

    (a)

    Human

    (b)

    Insects

    (c)

    Rhinoceros

    (d)

    Whale

  4. The relationship between sucker fish and shark is__________

    (a)

    Competition

    (b)

    Commensalism

    (c)

    Predation

    (d)

    Parasitism.

  5. Animals that can move from fresh water to sea called as______

    (a)

    Stenothermal

    (b)

    Eurythermal

    (c)

    Catadromous

    (d)

    Anadromous

  6. Some organisms are able to maintain homeostasis by physical means _______

    (a)

    Conform

    (b)

    Regulate

    (c)

    Migrate

    (d)

    Suspend.

  7. 5 x 1 = 5
  8. Greek word from which the term 'ecology' is derived ______________

    ()

    Eikos

  9. Movement of an organism in response to light

    ()

    pbototaxis

  10. Scientist who coined the term 'niche' ___________

    ()

    Charles Elton

  11. Zone of permafrost ______________

    ()

    tundra

  12. Type of forest in taiga ____________

    ()

    coniferous forest

  13. 5 x 1 = 5
  14. Taiga

  15. (1)

    Wild oats

  16. Temperature

  17. (2)

    Maple, Oak

  18. Grassland

  19. (3)

    Salmon

  20. Stenotherm

  21. (4)

    Willow, Maple, Oak

  22. Anadromous migration

  23. (5)

    Lizards

    6 x 2 = 12
  24. What is a Habitat?

  25. Define ecological niche.

  26. What is Pedogenesis?

  27. What is soil permeability?

  28. Differentiate between Eurytherms and Stenotherms.

  29. State Allen's rule.

  30. 4 x 3 = 12
  31. Give the diagnostic characters features of a Biome

  32. What are the ways by which organisms respond to abiotic factors?

  33. Differentiate Natality and Mortality

  34. Give an account of population regulation

  35. 2 x 5 = 10
  36. Differentiate between Tundra and Taiga Biomes.

  37. Describe Population Age Distribution

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