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IB Biology SL C4.2.16 Secondary Production Questions

Secondary production is biomass accumulation by heterotrophs. It depends on food intake, assimilation, respiration losses and biomass conversion. IB Biology SL C4.2.16 covers these relationships.

Syllabus
First assessment 2025
Course
Biology SL
Level
SL

Exam points

  • Calculate heterotroph biomass gain or required feed from a supplied food-to-biomass conversion ratio.
  • Compare feed conversion efficiency for edible biomass, accounting for assimilation and respiration losses.

IB Biology SL C4.2.16 Secondary Production Questions question 1

[Maximum number: 2]

The food conversion ratio (FCR) is the ratio between the mass of food given to a farmed animal and its corresponding increase in mass. The first bar chart shows the FCR for four farmed animals. The second bar chart shows the percentage yield of edible meat provided by each whole animal.

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

Question (a)

(a)

Calculate the increase in mass of a cow given 6 kg of food.

kg

[ 1 ]

Question (b)

(b)

Calculate how much food would be required to produce 20 kg of boar meat.

kg

[ 1 ]
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