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6. usually no more than...trophic levels
7. the other bars show the trophic level in order of...
- ...energy
- ...mass
- ...biomass
- ...size
8. pyramids of biomass will not go on forever because...
- there is not enough biomass in the top level to provide energy needed for another level
- there is not enough size energy in the top level to provide energy needed for another leve
- there is not enough energy in the top level to provide biomass needed for another leve
- there is not enough mass in the top level to provide energy needed for another leve
9. What is it measured in?
10. producer is which bar?