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12th Standard Botany - Principles of Ecology English Medium Free Online Test One Mark Questions 2020 - 2021

12th Standard

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Botany

Time : 00:10:00 Hrs
Total Marks : 10

    Answer all the questions

    10 x 1 = 10
  1. Arrange the correct sequence of ecological hierarchy starting from lower to higher level.

    (a)

    Individual organism → Population Landscape → Ecosystem

    (b)

    Landscape → Ecosystem → Biome → Biosphere

    (c)

    community → Ecosystem → Landscape → Biome

    (d)

    Population → organism → Biome → Landscape

  2. Which of the given plant produces cardiac glycosides?

    (a)

    Calotropis

    (b)

    Acacia

    (c)

    Nepenthes

    (d)

    Utricularia

  3. Read the given statements and select the correct option.
    Statement A : Cattle do not graze on weeds of Calotropis.
    Statement B : Calotropis have thorns and spines, as defense against herbivores.

    (a)

    Both statements A and B are incorrect.

    (b)

    Statement A is correct but statement B is incorrect

    (c)

    Both statements A and B are correct but statement B is not the correct explanation of statement A.

    (d)

    Both statements A and B are correct and statement B is the correct explanation of statement A.

  4. Read the following statements and fill up the blanks with correct option.
    i) Total soil water content in soil is called ______
    ii) Soil water not available to plants is called _______
    iii) Soil water available to plants is called _____.

    (a)
    (i) (ii) (iii)
    Holard Echard Chresard
    (b)
    i ii iii
    Echard Holard Chresard
    (c)
    i ii iii
    Chresard Echard Holard
    (d)
    i ii iii
    Holard Chresard Echard
  5. The plant of this group are adapted to live partly in water and partly above substratum and free from water ______.

    (a)

    Xerophytes

    (b)

    Mesophytes

    (c)

    Hydrophytes

    (d)

    Halophytes

  6. Sticky glands of Boerhavia and Cleome support _______.

    (a)

    Anemochory

    (b)

    Zoochory

    (c)

    Autochory

    (d)

    Hydrochory

  7. Autecology deals with the study of ___________.

    (a)

    Community

    (b)

    Population

    (c)

    Individual species

    (d)

    Niche of species

  8. The study of soil is called as __________

    (a)

    Lithotripsy

    (b)

    Lithosphere

    (c)

    Pedology

    (d)

    Pedigree analysis

  9. Statement 1: Ephemerals are drought evaders.
    Statement 2: They are not true xerophytes.

    (a)

    Statement 1 is correct. Statement 2 is incorrect.

    (b)

    Statement 1 is incorrect. Statement 2 is correct.

    (c)

    Both the statements are correct.

    (d)

    Both the statements are incorrect

  10. Utricularia is a __________.

    (a)

    Rooted floating hydrophyte

    (b)

    Submerged floating hydrophyte

    (c)

    Rooted submerged hydrophyte

    (d)

    Amphibious hydrophyte

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