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

The microscope in cell studies — practice question

The diagram represents a tropical ocean food chain, and the efficiency of energy transfer between trophic levels is 10\%. phytoplankton → herbivorous zooplankton → carnivorous zooplankton → small fish → tuna. The net primary production of phytoplankton is $1300\,\text{g m}^{-3}\,\text{yr}^{-1}$. What is the net primary production each year for the carnivorous zooplankton and the tuna?

  • Acarnivorous zooplankton: $1.3 \times 10^{1}$; tuna: $1.3 \times 10^{-1}$
  • Bcarnivorous zooplankton: $1.3 \times 10^{0}$; tuna: $1.3 \times 10^{-2}$
  • Ccarnivorous zooplankton: $1.3 \times 10^{-1}$; tuna: $1.3 \times 10^{-2}$
  • Dcarnivorous zooplankton: $1.3 \times 10^{-2}$; tuna: $1.3 \times 10^{-4}$

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