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IB Biology HL C4.2.13 Heat Loss Questions

Analyse how cellular respiration converts chemical energy to heat at every trophic level and why dissipated heat cannot be recycled in IB Biology HL C4.2.13.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Explain that cellular respiration converts chemical energy to heat at every trophic level, and that dissipated heat leaves the ecosystem so energy cannot be recycled.

IB Biology HL C4.2.13 Heat Loss Questions 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

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