The pyramid of biomass is variable in some:
Correct answer: B. Pond ecosystems
- A. Grassland ecosystems
- B. Pond ecosystems
- C. Parasitic ecosystems
- D. Forest ecosystems
Explanation
Ponds may show an inverted or otherwise variable biomass pyramid because rapidly reproducing phytoplankton can have less standing biomass than the zooplankton and fish supported by them. Grassland and forest biomass pyramids are usually upright.
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