DP Biology (first assessment 2025)

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Question 23M.2.HL.TZ2.a

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Date May 2023 Marks available [Maximum mark: 1] Reference code 23M.2.HL.TZ2.a
Level HL Paper 2 Time zone TZ2
Command term Outline Question number a Adapted from N/A
a.
[Maximum mark: 1]
23M.2.HL.TZ2.a

The diagram represents primary succession that occurs in an Arctic ecosystem, on a river floodplain in Alaska, USA. Permafrost is permanently frozen subsoil found in Arctic regions.

[Source: Bonanza Creek LTER.]

Outline primary succession.

[1]

Markscheme

colonization of areas that were barren/not previously inhabited/not occupied by organisms;

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