IB Biology HL C4.2.16 Secondary Production Questions

Analyse how food intake, assimilation and respiration determine heterotroph biomass production, and evaluate feed-conversion ratios for animal products in IB Biology HL C4.2.16.

Exam points

Analyse secondary production as heterotroph food intake minus assimilation and respiration losses, using supplied biomass or feed-conversion evidence.
Evaluate feed-conversion ratios and animal-production data to compare edible biomass efficiency and sustainability between named organisms.

[Maximum number: 2]

The diagram shows a simplified marine food web in an area of the North Pacific Ocean.

Figure for Question IB Biology HL C4.2.16 Secondary Production Questions question 1 — IB Biology HL

Explain reasons for the feed conversion ratio in fish being lower than in cattle.

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IB Biology HL C4.2.16 Secondary Production Questions question 1