IB ESS HL 2.2.27 Lower Trophic Level Yields Question Bank
Explain why harvesting lower trophic levels can alter yield and ecosystem stability.
- Syllabus
- First assessment 2026
- Course
- ESS HL
- Level
- HL
Exam points
- identify the productivity or efficiency quantity
- apply the appropriate calculation and units
- interpret the ecological consequence of the result
2.2.27 (HL)—Lower trophic level yields question 1
[Maximum number: 2]
Identify two reasons why a human vegetarian diet is considered to be more energy efficient than a diet containing meat.
eating lower down the food chain;
less land area to produce the food needed;
more efficient use of the energy fixed by photosynthesis;
less energy lost to respiration and wastes; entropy increases so energy cannot all be passed to the next trophic level;
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