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IB Biology HL 4.2.9 Energy release Question Bank

Practise IB Biology HL 4.2.9 by analysing how respiration and gas exchange release carbon dioxide in marine organisms.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Analyse respiration and diffusion pathways that transfer carbon dioxide from marine tissues to water.
  • Evaluate carbon-dioxide release evidence in relation to organism metabolism and gas exchange.

C4.2.9—Energy release question 1

[Maximum number: 1]

The mass of an individual organism can affect its physiology and feeding ecology. The diagram shows the relative mass of carbon (black) and total wet mass (grey) of a marine crustacean, Calanus hyperboreus and a jellyfish, Bathocyroe fosteri.

Figure for Question C4.2.9—Energy release question 1 — IB Biology HL
Figure for Question C4.2.9—Energy release question 1 — IB Biology HL

State one process that results in the loss of carbon dioxide from a marine organism such as a crustacean or a jellyfish.

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