Ecology - Junejo

20 Questions

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Ecology - Junejo

XII - Biology Sindh Text Book


Questions and Answers
  • 1. 
    The scientific study of various relationship between living organisms with each other and with their environment is called 
    • A. 

      Ecology

    • B. 

      Physiology

    • C. 

      Meterology

    • D. 

      Geology

  • 2. 
    Second level of ecological organization is called
    • A. 

      Community

    • B. 

      Ecosystem

    • C. 

      Population

    • D. 

      Habitat

  • 3. 
    Type of environment in which populations lives is its
    • A. 

      Ecosystem

    • B. 

      Biome

    • C. 

      Habitat

    • D. 

      Community

  • 4. 
    Interaction between abiotic and biotic components is called
    • A. 

      Population

    • B. 

      Community

    • C. 

      Niche

    • D. 

      Ecosystem

  • 5. 
    On the basis of sun light availability plants which are growing in shades are called 
    • A. 

      Sciophytes

    • B. 

      Heliophytes

    • C. 

      Halophytes

    • D. 

      Hydrophytes

  • 6. 
    Which one is not a climate factor
    • A. 

      Atmosphere

    • B. 

      Rain

    • C. 

      Altitude

    • D. 

      Temperatue

  • 7. 
    Abiotic factors which are related with the condition and composition of soil are called
    • A. 

      Edaphic factors

    • B. 

      Topographic factors

    • C. 

      Climatic factors

    • D. 

      Biotic factors

  • 8. 
    Not a heterotroph in an ecosystem. 
    • A. 

      Phytoplankton

    • B. 

      Decomposer

    • C. 

      Herbivore

    • D. 

      Carnivore

  • 9. 
    In Nitrogen cycle ---------------- bacteria converts ammonia to nitrites.
    • A. 

      Rhizobium

    • B. 

      Azotobacter

    • C. 

      Nitrobacter

    • D. 

      Nitrosomonas

  • 10. 
    The estuaries are area where
    • A. 

      River meets lakes

    • B. 

      Lakes meet sea

    • C. 

      Rivers meets sea

    • D. 

      Sea meets land

  • 11. 
    The individual developmental stage in ecological succession is referred as 
    • A. 

      Sere

    • B. 

      Seral stage

    • C. 

      Pioneer stage

    • D. 

      Climax stage 

  • 12. 
    The circulation and cycling of various elements from environment to organism and back to environment in circular paths is called
    • A. 

      Ecological niche

    • B. 

      Biogeochemical cycles

    • C. 

      Ecological succession 

    • D. 

      Environmental biology

  • 13. 
    Orderly changes in community from simple to more complex form is called 
    • A. 

      Primary productivity 

    • B. 

      Biogeochemical cycles 

    • C. 

      Ecological succession 

    • D. 

      Ecology

  • 14. 
    Which one is secondary consumer in this food chain? Sun --> Mango tree --> Grass hopper --> Frog --> Snake 
    • A. 

      Mango tree

    • B. 

      Frog

    • C. 

      Snake

    • D. 

      Grass hopper

  • 15. 
    Phytoplanktons are --------------------- and Zooplanktons are -------------------- in pond ecosystem
    • A. 

      Herbivore -- Primary consumer

    • B. 

      Autotrophs -- Decomposer

    • C. 

      Producer -- Primary consumer

    • D. 

      Secondary consumer -- Tertiary consumer

  • 16. 
    Relationship between two living organisms for mutual benefit is called
    • A. 

      Parasitism

    • B. 

      Commensalism

    • C. 

      Mutualism 

    • D. 

      Predation

  • 17. 
    Producers, Consumers and Decomposer are
    • A. 

      Heterotroph in an ecosystem

    • B. 

      Recycler in an ecosystem

    • C. 

      All are consumers

    • D. 

      All are Biotic components

  • 18. 
    Each organism play an important role in an ecosystem its requirements, activities and effects are collectively known as 
    • A. 

      Habitat

    • B. 

      Ecological niche

    • C. 

      Ecological succession 

    • D. 

      Ecological system

  • 19. 
    Sliver fish mainly found in old books, here old books are ................... for silver fish.
    • A. 

      Food and nutrients 

    • B. 

      Environment

    • C. 

      Habitat

    • D. 

      Community 

  • 20. 
    Flow of energy and cycling of matter between livings and non livings are studied in 
    • A. 

      Ecosystem 

    • B. 

      Synecology 

    • C. 

      Habitat

    • D. 

      Autecology