Biology

1. Recall the 10% rule in ecology:

In an ecosystem, only about 10% of the energy available at one trophic level is transferred to the next trophic level.

Autotrophs are the producers (e.g., plants), primary consumers are the herbivores that eat the autotrophs, and secondary consumers are the carnivores that eat the primary consumers.

2. Apply the 10% rule:

If primary consumers consume autotrophs, they receive about 10% of the energy produce...