DP Biology (first assessment 2025)

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Question 22N.1A.SL.TZ0.19

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Date November 2022 Marks available [Maximum mark: 1] Reference code 22N.1A.SL.TZ0.19
Level SL Paper 1A Time zone TZ0
Command term Question number 19 Adapted from N/A
19.
[Maximum mark: 1]
22N.1A.SL.TZ0.19

Carbon sinks are any reservoirs that absorb and store carbon dioxide from the atmosphere. Which process increases the size of the carbon sink in oceans?

A.  Photosynthesis

B.  Respiration

C.  Ocean acidification

D.  Decomposition

[1]

Markscheme

A

Examiners report

This question asked the candidates to identify which process would increase the size of carbon sinks in oceans. The question performed badly with only 14 % of candidates answering correctly. In retrospect, the question should have been reworded to make the correct response less ambiguous.

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