Question

which of the following limits the number of trophic levels in a food chain
a. food supply
b. decrease in energy at each trophic level
c. polluted water
d. water​

Answer 1

Answer:

b. decrease in energy at each trophic level.

Explanation:

Decrease in energy at higher trophic levels limits the number of trophic levels in a food chain. At each trophic level, a large portion of energy is utilised for the maintenance of organisms that occur at that trophic level.

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Answer 2

Answer:

All ecosystems are characterised by two basic features- the unidirectional flow of energy and cycling of materials.

At each trophic level, most of the energy available is utilised for life processes and only ten percent of the available energy is passed on to the next level. Because only ten percent of the available energy can be passed on to the next trophic level, the higher trophic levels have substantially less energy content and the number of trophic levels in a food chain is limited.

So, the correct answer is ------------

'Decrease in energy at higher trophic levels'

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