12th Class Biology Sample Paper Biology - Sample Paper-1

  • question_answer
    The diagrammatic illustration of connection between different trophic levels is given here.
    (i) Identify the type of ecological pyramid and explain what does the base and the apex of this pyramid indicate?
    (ii) Give examples of such type of ecological pyramids with respect to number and biomass.)

    Answer:

    (i) The given pyramid is an inverted ecological pyramid. The base and the apex of this pyramid represent the producers (first trophic level) and tertiary level consumers, respectively.
    (ii) Examples of such ecological pyramids are as follows
    (a) Pyramid of number in a tree ecosystem.
    (b) Pyramid of biomass in a pond ecosystem.


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