Botany - Principles of Ecology Model Question Paper

12th Standard EM

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Biology

Time : 02:00:00 Hrs
Total Marks : 50
    7 x 1 = 7
  1. A specific place in an ecosystem, where an organism lives and performs its functions is

    (a)

    habitat

    (b)

    niche

    (c)

    landscape

    (d)

    biome

  2. Which of the given plant produces cardiac glycosides?

    (a)

    Calotropis

    (b)

    Acacia

    (c)

    Nepenthes

    (d)

    Utricularia

  3. In soil water available for plants is

    (a)

    gravitational water

    (b)

    chemically bound water

    (c)

    capillary water

    (d)

    hygroscopic water

  4. Ophrys an orchid resembling the female of an insect so as to able to get pollinated is due to phenomenon of

    (a)

    Myrmecophily

    (b)

    Ecological equivalents

    (c)

    Mimicry

    (d)

    None of these

  5. Pedogenesis refers to

    (a)

    Fossils

    (b)

    Water

    (c)

    Population

    (d)

    Soil

  6. Strong, sharp spines that get attached to animal’s feet are found in the fruits of

    (a)

    Argemone

    (b)

    Ecballium

    (c)

    Heritier

    (d)

    Crossandra

  7. Sticky glands of Boerhaavia and Cleome support

    (a)

    Anemochory

    (b)

    Zoochory

    (c)

    Autochory

    (d)

    Hydrochory

  8. 5 x 1 = 5
  9. The surface features of earth are called _________.

    ()

    Topography

  10. Amensalism is called as__________.

    ()

    Antibiosis

  11. ______________ is the transition zone between two ecosystems.

    ()

    Ecotone

  12. Wasps is the fruits of fig is an example for _________ type of species interaction

    ()

    Mutualism

  13. Plants in sandy soils are commonly called as ____________.

    ()

    Psammophytes

  14. 5 x 1 = 5
  15. Parental bedrock

  16. (1)

    +,-

  17. Mutualism

  18. (2)

    R-Horizon

  19. Predation

  20. (3)

    +,+

  21. Competition

  22. (4)

    -.0

  23. Amensalism

  24. (5)

    -,-

    5 x 2 = 10
  25. Define ecology.

  26. Distinguish habitat and niche

  27. What is Phytoremediation ?

  28. Soil formation can be initiated by biological organisms. Explain how?

  29. Describe the mutual relationship between the fig and wasp and comment on the phenomenon that operates in this relationship.

  30. 6 x 3 = 18
  31. What is mutualism? Mention any two example where the organisms involved are commercially exploited in modern agriculture.

  32. List any two adaptive features evolved in parasites enabling them to live successfully on their host?

  33. Water is very essential for life. Write any three features for plants which enable them to survive in water scarce environment.

  34. What is vivipary? Name a plant group which exhibits vivipary.

  35. What is myrmecophily?

  36. What is seed ball?

  37. 1 x 5 = 5
  38. Explain different types of hydrophytes with examples.

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