Competitive Exams: Zoology MCQs (Practice-Test 7 of 112)

  1. Allopatic populations arise due to

    1. mutation of species of any one geographic region

    2. geographical separation of populations

    3. migration of members of a species from one geographical area to another

    4. hybridization between closely related species belonging to different geographical regions

  2. The number of links in a food chain depends upon the

    1. number of organisms in an ecosystem

    2. number of producers in an ecosystem

    3. length of food chain in an ecosystem

    4. length of day

  3. Neustons are the organisms which

    1. rest on the bottom of water

    2. can float on water

    3. rest or swim on the surface of water

    4. can swim in water

  4. Consider the following pairs:

      • Bathyal zone
      • Archibenthic zone
      • Littoral zone
      • Limmettic zone
      • Oceanic zone
      • Sub-littoral zone

    Which of these pairs are correctly matched?

    1. 1, 2 and 3

    2. 1 and 3

    3. 1 and 2

    4. 2 and 3

  5. The eulittoral zone provides which one of the following sets of major habitats?

    1. Rocky, sandy and muddy shores

    2. Submerged rocks; rocks with loose stones and mud

    3. Benthic, deep sea and estuary

    4. Abyssal, sandy and rocky

  6. In which one of the following terrestrial biomes does the variety of life reach its culmination?

    1. Tropical rain forests

    2. Tropical grasslands

    3. Temperate deciduous forests

    4. Northern coniferous forests

  7. The occurrence of re1ativel/definite sequence of communities over a period of time in the same area is known as

    1. ecological succession

    2. ecosystem development

    3. species continuation

    4. special stabilization

  8. Consider the following statements: Lotic ecosystems are characterized by

    1. lack of thermal stratification

    2. oxygen stagnation in deep layers of water

    3. a greater land-water interchange

    Which of the above statements are correct?

    1. 1 and 2

    2. 1 and 3

    3. 2 and 3

    4. 1, 2 and 3

  9. Match List I (Type of biological rhythm) with List II (Duration of each rhythm) and select the correct answer:

    List-I List-II
    1. Circadian

    2. Circannual

    3. Circaseptan

    4. Circadiseptan

    1. 7 − 3 days

    2. 1 year-2 months

    3. 14 − 3 days

    4. 24 − 4 days

    • A
    • B
    • C
    • D
      • 4
      • 2
      • 3
      • 1
      • 2
      • 1
      • 4
      • 3
      • 4
      • 2
      • 1
      • 3
      • 2
      • 1
      • 3
      • 4
  10. Deposition of material on the earth's surface by rivers and other agents is known as

    1. biocoenosis

    2. profundation

    3. aggradation

    4. trophic succession

  11. A river bed from its origin to its mouth is a

    1. smooth curve

    2. irregular curve

    3. acute curve-in the beginning followed by smooth curve

    4. acute curve for most of the route followed by a small smooth curve

  12. The alpine biome refers to a distinct flora and fauna which characterises the region

    1. below the timber line of the mountains

    2. above the timber line of the mountains

    3. between the sub-snow zone and the meadow zone of the mountains

    4. between the snow zone and sub-snow zone of the mountains

  13. Which one of the following pairs of insect pests and crops is correctly matched?

      • Dysdercus sp
      • Paddy.
      • Psylla sp
      • Apple
      • Locus sp
      • Wheat
      • Leptocorisa sp
      • Brinjal
  14. Commercial shellac is obtained from the secretion of

    1. lac insect

    2. stick insect

    3. preying mantis

    4. ichneumon wasps

  15. Honey is nectar

    1. obtained from flowers and stored in beehive

    2. and pollen obtained from flowe1s and stored in beehive

    3. of flowers processed by honey bee by mixing with saliva

    4. of flowers diluted by honey bee by mixing with saliva