Life on the Earth

  • Question 5

    Define ecological system. 

    The interactions of a particular group of organisms with abiotic factors within a particular habitat resulting in clearly defined energy flows and material cycles on land, water and air, are called ecological systems.
    Question 6

    Who are decomposer? State two scavengers. 

    Decomposers are those that feed on dead organisms, and further breaking down of the dead matter by other decomposing agents like bacteria and various microorganisms.
    For example, scavengers like vultures and crows.
    Question 7

    What are two types of ecosystems? 


    Ecosystems are of two major types:

    i. terrestrial

    ii. aquatic.

    Question 8

    Describe ecological efficiency.

    The percentage of energy transferred from one trophic level to another is called ecological efficiency. The efficiency of energy transfer from one trophic level to another varies from 5% to 20% depending on the types of organisms and environmental conditions.

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