BI-1863
Pyramids of numbers and biomass
Biology · Secondary 4 · Medium · Pyramids of numbers and biomass
A scientist measures the dry mass of organisms at each trophic level in a grassland. Which pyramid of biomass shape is most likely for the food chain grass → grasshoppers → frogs → hawks?
- a wide base for grass, then narrower layers for grasshoppers, frogs and hawks
- all layers equal in width for each trophic level
- narrow base for grass, widest layer at the top for hawks
- widest layer in the middle for frogs, narrow at both base and top
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