ইকোলজি এন্ড এনভায়রনমেন্ট

  • ০০। "Manual of silviculture for Pakistan" authored by:
    • ক) Simmons and H.M.Rana
    • খ) Champion, Seth and Kattak
    • গ) Ahmad Hussain
    • ঘ) None of these
  • ০১। A biotic community comprises:
    • ক) Plants only
    • খ) Animals only
    • গ) Plants and animals
    • ঘ) Plants or animals
  • ০২। A clear-felling with a forest protection over wood and regeneration from coppice is called:
    • ক) Simple coppice system
    • খ) Shelterwood coppice system
    • গ) Uniform system
    • ঘ) None of these
  • ০৩। A complex of several species and communities in various stages of succession maintained under similar climatic conditions is known as:
    • ক) Biome
    • খ) Environmental complex
    • গ) Biological spectrum
    • ঘ) Biological clocks
  • ০৪। A crocodile had just eaten a lamb when a hawk saw the crocodile attacked it, and consumed it. The hawk is in ecological terms:
    • ক) A producer
    • খ) A primary consumer
    • গ) A secondary consumer
    • ঘ) A tertiary consumer
  • ০৫। A food chain consists of:
    • ক) Producers and primary consumers
    • খ) Producer, herbivores and carnivores
    • গ) Produers, carnivores and decomposers
    • ঘ) Producers, consumers and decomposers
  • ০৬। A food chain has the following trophic levels:
    • ক) 3 or 4
    • খ) 3
    • গ) 2
    • ঘ) 1
  • ০৭। A food chain starts with:
    • ক) Nitrogen fixing organisms
    • খ) Photosynthesizing organisms
    • গ) Respiration
    • ঘ) Decomposers
  • ০৮। A habitat of long severe winters and growing season limited to a few months of summer constitutes:
    • ক) Savana ecosystem
    • খ) Taiga ecosystem
    • গ) Tundra ecosystem
    • ঘ) None of the above
  • ০৯। A man is the part of biotic community:
    • ক) Always
    • খ) Only when he lives in big cities
    • গ) Only when he lives in forest
    • ঘ) Never
  • ১০। A plant, being eaten by a herbivore which in turn is eaten by a carnivore, makes a:
    • ক) Food chain
    • খ) Web of food
    • গ) Biomass
    • ঘ) Interdependence
  • ১১। Abiotic components are:
    • ক) Inorganic
    • খ) Organic
    • গ) Climatic
    • ঘ) All of the above
  • ১২। Abiotic factors are:
    • ক) Climatic
    • খ) Edaphic factors
    • গ) Topography
    • ঘ) All of the above
  • ১৩। Accelerated soil erosion factors are:
    • ক) Soil erosion by water
    • খ) Soil erosion by wind
    • গ) Both (a) & (b)
    • ঘ) None of these
  • ১৪। According to Lindemann, the percentage of net production passed on to carnivores is:
    • ক) 28.6
    • খ) 26.8
    • গ) 22.6
    • ঘ) 22.8
  • ১৫। According to Lindemann, the total solar input in terms of gcal/cm2/year is:
    • ক) 112,887
    • খ) 118,872
    • গ) 181,872
    • ঘ) 112,788
  • ১৬। According to Odum the light absorbed by the plant cover in terms of kcal/m2/day is:
    • ক) 150
    • খ) 1,500
    • গ) 300
    • ঘ) 3,000
  • ১৭। According to Odum, the percentage of net primary production of total light intake is:
    • ক) 10%
    • খ) 0.15%
    • গ) 1%
    • ঘ) 1.50%
  • ১৮। All the living organisms on the earth interacting with atmosphere constitute:
    • ক) Biosphere
    • খ) Community
    • গ) Biome
    • ঘ) Association
  • ১৯। An ecosystem is a structure that is:
    • ক) Always temporary
    • খ) Always permanent
    • গ) Either of these
    • ঘ) Rarely permanent
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