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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
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০১। A biotic community comprises:
- ক) Plants only
- খ) Animals only
- গ) Plants and animals
- ঘ) Plants or animals
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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
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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
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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
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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
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০৬। A food chain has the following trophic levels:
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০৭। A food chain starts with:
- ক) Nitrogen fixing organisms
- খ) Photosynthesizing organisms
- গ) Respiration
- ঘ) Decomposers
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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
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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
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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
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১১। Abiotic components are:
- ক) Inorganic
- খ) Organic
- গ) Climatic
- ঘ) All of the above
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১২। Abiotic factors are:
- ক) Climatic
- খ) Edaphic factors
- গ) Topography
- ঘ) All of the above
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১৩। Accelerated soil erosion factors are:
- ক) Soil erosion by water
- খ) Soil erosion by wind
- গ) Both (a) & (b)
- ঘ) None of these
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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
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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
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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
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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%
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১৮। All the living organisms on the earth interacting with atmosphere constitute:
- ক) Biosphere
- খ) Community
- গ) Biome
- ঘ) Association
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১৯। An ecosystem is a structure that is:
- ক) Always temporary
- খ) Always permanent
- গ) Either of these
- ঘ) Rarely permanent