BI-1959
Energy losses in food chains
Biology · Secondary 4 · Hard · Energy losses in food chains
In a food chain, 500 kg of grass supports 50 kg of rabbits, which in turn supports 5 kg of foxes. Which statement best explains why the total biomass of foxes is much smaller than that of grass?
- Most of the energy is lost between each trophic level, so little is available to build fox biomass.
- Foxes eat less often than rabbits, so they gain less energy from food.
- Grass has a higher water content than foxes, so its biomass appears larger.
- Energy is created at each trophic level, so producers must have the smallest biomass.
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