DP Biology (first assessment 2025)

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Question 20N.2.SL.TZ0.c

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Date November 2020 Marks available [Maximum mark: 1] Reference code 20N.2.SL.TZ0.c
Level SL Paper 2 Time zone TZ0
Command term Explain Question number c Adapted from N/A
c.
[Maximum mark: 1]
20N.2.SL.TZ0.c

The graph shows how the number of ant species found on isolated islands near New Guinea depends on the size of the island.

[Source: University of Windsor, The Theory of Island Biogeography. Available at:
http://web2.uwindsor.ca/courses/biology/macisaac/55-437/lecture9.htm.]

 

Explain the relationship between island size and number of ant species.

[1]

Markscheme

(the larger islands contain) more species as there are more habitats;

Examiners report

The graph showing the number of ant species according to island size required an explanation of the graph. Many candidates simply stated the relationship with no explanation.

Syllabus sections