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12th Standard Zoology - Organisms and Population English Medium Free Online Test One Mark Questions 2020 - 2021

12th Standard

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Zoology

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

    Answer all the questions

    10 x 1 = 10
  1. All populations in a given physical area are defined as

    (a)

    Biome

    (b)

    Ecosystem

    (c)

    Territory

    (d)

    Biotic factors

  2. Match the following and choose the correct combination from the options given below.

    Column I Column II
    A. Mutalism 1. Lion and deer
    B. Commensalism 2. Round worm and man
    C. Parasitism 3. Birds compete with squirrels for nuts
    D. Competition 4. Sea anemone on hermit crab
    E. Predation 5. Barnacles attached to Whales.
    (a)

    A- 4, B-5, C-2, D –3, E-1

    (b)

    A- 3, B-1, C-4, D – 2, E-5

    (c)

    A- 2, B-3, C-1, D – 5, E-4

    (d)

    A- 5, B-4, C-2, D – 3, E-1

  3. The relationship between sucker fish and shark is__________

    (a)

    Competition

    (b)

    Commensalism

    (c)

    Predation

    (d)

    Parasitism.

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

    (a)

    Conform

    (b)

    Regulate

    (c)

    Migrate

    (d)

    Suspend.

  5. The word 'niche' was first used by __________

    (a)

    Charles Elton

    (b)

    Van't Hoff

    (c)

    Bergmann

    (d)

    Jordon

  6. "Birds and mammals attain greater body size in colder regions than warmer regions." - Choose the correct option.

    (a)

    Bergmann's rule

    (b)

    Jordon's rule

    (c)

    Sewall wright effect

    (d)

    Allen's rule

  7. Diapause is a type of response classifiedunder ______________

    (a)

    Suspend

    (b)

    Migrate

    (c)

    Conform

    (d)

    Regulate

  8. Which two of the following changes (A to D) usually tend to occur in the plain dwellers when they move to high altitudes (3500 m or more)?
    A) Increase in red blood cell size
    B) Increase in red blood cell production
    C) Increased breathing rate
    D) Increase in thrombocyte count

    (a)

    (B) and (C)

    (b)

    (C) and (D)

    (c)

    (A) and (D)

    (d)

    (A) and (B)

  9. Gause's principle of competitive exclusion states that:

    (a)

    More abundant species will exclude the less abundant species through competition

    (b)

    Competition for the same resources excludes species having different food preferences

    (c)

    No two species can occupy the same niche indefinitely for the same limiting resources

    (d)

    Larger organisms exclude smaller ones through competition

  10. Maximum reproductive capacity of an organism under favorable condition is referred to as_______________

    (a)

    Carrying capacity

    (b)

    Biotic potential

    (c)

    Natality

    (d)

    Fecundity

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