AP Biologymediummcq1 pt
The number of trophic levels a food chain can support is limited by
A.energy loss between levels
B.the number of species available
C.predator speed
D.available water
Explanation
Core Concept
Because only a fraction of energy becomes biomass available to the next trophic level, progressively less energy is available to support organisms higher in a food chain. This limits the abundance, biomass, and often the number of upper trophic levels, but thermodynamics does not impose a universal rule that a sixth trophic level is impossible.
Correct Answer
Aenergy loss between levels
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