Biologyhard · Past Paper
Which ecological concept explains why there are usually no more than 4 or 5 trophic levels in a food chain?
ACompetitive exclusion
BNatural selection
CEnergy loss at each level
DSpeciation
✓ Correct Answer: C — Energy loss at each level
Since 90% of energy is lost at each level, by the 5th level, there is too little energy left to support another population.
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