52. Ecosystems
Ecosystems
Multiple Choice
Multiple ChoiceIn ecosystems, organisms at the highest trophic levels usually contain less collective biomass than the organisms at lower trophic levels because __________.
A
biomass shrinks as it rises
B
top-level predators use so much energy to catch their food
C
producers (for example, plants) tend to be heavier than consumers (for example, birds)
D
most of the solar energy hitting Earth is reflected back into space
E
organisms are inefficient at converting the energy they consume into biomass
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