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

Question

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

Accepted Answer

Soln:

Answer is (a) Decrease in energy at higher trophic levels
Explanation:
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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