1.

Which of the following limits the number of trophic levels in a food chain? (a) A decrease in energy at higher trophic levels (b) Sufficient food supply(c) Polluted air (d) Water

Answer»

The answer is (a) Decrease in energy at higher trophic levels

  • Available energy level at a particular trophic level is 10 times the energy level at next tropic level. 
  • When we reach fourth trophic level; a minute portion of energy from producer is available.


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