1.

The flow of energy between various components of the environment has been extensively studied. List four findings.

Answer»
  • Flow of energy is unidirectional.
  • Terrestrial plants take about 1% of the Sun’s energy and change it to chemical energy.
  • A great deal of energy is -lost as heat/ used for digestion/doing work/growth and reproduction.
  • Only 10% of organic matter present at each trophic level (and available to next trophic level). 
  • Food chains are mainly of 3-4 trophic levels (because of 10% law)
  • The number of producers are maximum (the number reduces in subsequent trophic levels).
  • Food webs are more common (as compared to isolated food chains).
  • Biological magnification can be observed.


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