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Date November 2018 Marks available 2 Reference code 18N.3.SL.TZ0.12
Level Standard level Paper Paper 3 Time zone TZ0 / no time zone
Command term Discuss Question number 12 Adapted from N/A

Question

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.

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

 

[1]
a.

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

[1]
b.

With reference to the data, discuss the farming of salmon for sustainable food production.

[2]
c.

Markscheme

1 kg ✔

Working not required

a.

120 kg ✔

Working not required

b.

a. small amount of/least food resources used in production ✔

b. high yield means less energy lost in respiration
OR
high yield means less waste of inedible material ✔

c. other resources/cost of production/nutritional values not mentioned ✔

eg: habitat, heating, water

 

d. sustainability requires knowledge of the effect on the environment/pollution/contamination of water supply
OR
sustainability requires minimal use of drugs/chemicals/antibiotics ✔

e. example of ethical issue ✔

eg: it may spread diseases to wild population

c.

Examiners report

[N/A]
a.
[N/A]
b.
[N/A]
c.

Syllabus sections

Option C: Ecology and conservation » Option C: Ecology and conservation (Core topics) » C.2 Communities and ecosystems
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Option C: Ecology and conservation » Option C: Ecology and conservation (Core topics)
Option C: Ecology and conservation

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