Biology 9700 · AS & A Level · Carbohydrates and lipids

Carbohydrates and lipids — practice question

The diagram illustrates a tropical ocean food chain with $10\%$ efficiency of energy transfer between trophic levels. Net primary production of phytoplankton is $1300\,\text{g m}^{-3}\,\text{yr}^{-1}$. What is the annual net primary production 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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