IB Biology HL 4.2.13 Heat loss Question Bank
Practise IB Biology HL 4.2.13 by analysing respiration and energy-loss pathways that limit trophic transfer.
- Syllabus
- First assessment 2025
- Course
- Biology HL
- Level
- HL
Exam points
- Analyse how respiration and heat loss reduce energy available to primary consumers.
- Evaluate energy-transfer efficiency in marine food chains using trophic evidence.
C4.2.13—Heat loss question 1
[Maximum number: 1]
Plankton are major producers in marine ecosystems. Only a small proportion of the energy harvested by plankton is passed to the primary consumers. Which process in phytoplankton results in the largest loss of energy that could otherwise be utilized by consumers?
A
Reproduction
B
Homeostasis
C
Excretion
D
Respiration
D
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