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Ecosystem Test ...

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  • Question 1
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    Read the passage and answer the following question.

    Vegetation follows established patterns of regrowth and change after disturbances by farming, timber harvesting, hurricanes, or fire. This process of patterned regrowth and change is called plant succession. The rate of succession and the species present at various stages depending on the type and degrees of disturbance, the environment of the particular sites, and the species available to occupy the site. In the Piedmont of North Carolina, land subjected to disturbances will grow back in a century or two to become mixed hardwood forest.

    Based on this diagram, after 80 years, which will make up the majority of trees?

  • Question 2
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    In ecological succession,

  • Question 3
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    The least amount of stored chemical energy is found in which of the following trophic level?

  • Question 4
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    The amount of energy get reduce as it moves from producers to primary consumers because

  • Question 5
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    In an ecosystem undergoing succession, replacement of a plant community takes place due to

  • Question 6
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    Which of the following explains stable ecosystem?

  • Question 7
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    What change would take place in the given ecosystem with time?

  • Question 8
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    The diagram above shows an ecological pyramid of net productivity that describes the multiplicative loss of energy in a food chain. Each trophic level in the food chain is represented by a bar in the pyramid, with primary producers forming the foundation of the pyramid. The size of each block represents the productivity at each trophic level per unit of time.
    In the above example, approximately how much energy available in each trophic level is converted into new biomass in the trophic level above it?

  • Question 9
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    Select the correct statement about succession.

  • Question 10
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    Which of the following processes is responsible for the existence of a stream free of pollutants within a few miles downstream of a point at which a small amount of sewage is dumped into it?

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