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Question 21N.2.SL.TZ0.1a.ii

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Date November 2021 Marks available [Maximum mark: 1] Reference code 21N.2.SL.TZ0.1a.ii
Level SL Paper 2 Time zone TZ0
Command term Deduce Question number a.ii Adapted from N/A
a.ii.
[Maximum mark: 1]
21N.2.SL.TZ0.1a.ii

The incidence of white syndrome, an infectious disease of coral, was investigated in a six-year study on Australia’s Great Barrier Reef. The map shows disease conditions on coral reefs at six study sites.

[Source: adapted from Bruno, J.F., Selig, E.R., Casey, K.S., Page, C.A., Willis, B.L., Harvell, C.D., Sweatman,
H. and Melendy, A.M., 2007. PLOS Biology, [e-journal] 5(6), e124. https://doi.org/10.1371/journal.pbio.0050124.]

(a.ii)

Deduce whether there is a trend in the incidence of white syndrome over the north-south range of latitude.

[1]

Markscheme

there is no clear trend;

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