DP Biology (first assessment 2025)

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Question 19N.1A.SL.TZ0.19

Date	November 2019	Marks available	[Maximum mark: 1]	Reference code	19N.1A.SL.TZ0.19
Level	SL	Paper	1A	Time zone	TZ0
Command term	Deduce	Question number	19	Adapted from	N/A

19.

[Maximum mark: 1]

19N.1A.SL.TZ0.19

In the diagram, which of the processes labelled A to D transfers the largest mass of carbon per year in a woodland ecosystem?

[Source: © International Baccalaureate Organization 2019]

[1]

Markscheme

B

Syllabus sections

C. Interaction and interdependence » C4.2. Transfers of energy and matter » C4.2.17. Constructing carbon cycle diagrams

C. Interaction and interdependence » C4.2. Transfers of energy and matter » C4.2.18. Ecosystems as carbon sinks and carbon sources

C. Interaction and interdependence » C4.2. Transfers of energy and matter » C4.2.19. Release of carbon dioxide into the atmosphere during combustion of biomass, peat, coal, oil and natural gas