The first link in any food chain is always a green plant because

  • A
    They are widely distributed
  • B
    They are firmly fixed to the soil
  • C
    They alone have a capacity to fix atmospheric $CO_2$ in the presence of sunlight
  • D
    All of the above

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Energy for the detritus food chain comes from

In an ecosystem,if the Net Primary Productivity $(NPP)$ of the first trophic level is $100x \text{ kcal } m^{-2} yr^{-1}$,what would be the Gross Primary Productivity $(GPP)$ of the third trophic level of the same ecosystem?

If $20 \ J$ of energy is trapped at the producer level,then how much energy will be available to the peacock as food in the following food chain (in $J$)?
Plant $\rightarrow$ Mice $\rightarrow$ Snake $\rightarrow$ Peacock

Which one is the correct food chain?

Of the total incident solar radiation,the percentage of photosynthetically active radiation $(PAR)$ captured by the plants is

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