Biology 9700 · AS & A Level · The microscope in cell studies

The microscope in cell studies — practice question

The table presents the findings from a field study of four species in a food chain in an area. Species P: number of individuals = 10 000, biomass of one individual = 0.100 (arbitrary units), energy value per unit mass = 1.0 (arbitrary units). Species Q: number of individuals = 5, biomass of one individual = 10.000 (arbitrary units), energy value per unit mass = 2.0 (arbitrary units). Species R: number of individuals = 500, biomass of one individual = 0.002 (arbitrary units), energy value per unit mass = 1.8 (arbitrary units). Species S: number of individuals = 3, biomass of one individual = 300 000.000 (arbitrary units), energy value per unit mass = 0.5 (arbitrary units). Which pyramid of energy is correct using these data?

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