Question

How much of the energy created by producers is available at the primary consumer level of an energy pyramid?
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10 percent
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1 percent
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9 percent
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90 percent

Answer 1

In an energy pyramid, typically about **10 percent** of the energy created by producers is available to primary consumers. This concept is known as the "10% rule" in ecology, which suggests that as energy moves up the trophic levels, only a fraction of the energy is transferred from one level to the next.