CAIE IGCSE Biology 19.2.19 It Is More Energy Efficient for Humans Questions
Practise explaining why eating crop plants transfers more energy to humans than eating livestock fed on those crops.
- Syllabus
- 2026–2028
- Course
- Biology 0610
Exam points
- compare the shorter trophic route when humans eat crops rather than crop-fed livestock
- explain energy losses during livestock feeding that reduce energy available to humans
CAIE IGCSE Biology 19.2.19 It Is More Energy Efficient for Humans Questions question 1
[Maximum number: 4]
Animals such as salmon can be farmed for meat.
Explain why it is more energy efficient for humans to eat crop plants than to eat livestock that have been fed on crop plants.
any four from:
as fewer trophic levels / plants are at a lower trophic level (than salmon / livestock) ;
ora
idea that energy transfer along food chain is inefficient ;
(energy lost in) respiration / heat / (named) metabolic process / movement / muscle contraction ;
ref to (more) material that is lost as, faeces / egested / inedible / not digestible (in longer food chains) ;
(energy lost in) excretion / urine ;
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