DP Biology (first assessment 2025)

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Question 19M.2.HL.TZ1.d

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Date May 2019 Marks available [Maximum mark: 3] Reference code 19M.2.HL.TZ1.d
Level HL Paper 2 Time zone TZ1
Command term Compare and contrast Question number d Adapted from N/A
d.
[Maximum mark: 3]
19M.2.HL.TZ1.d

Based on the data, compare and contrast the progress of the epidemic in Liberia and Guinea.

[3]

Markscheme

a. overall pattern similar in both/both show a rise and a fall in the infections ✔

b. both countries show an increase during 2014
OR
neither country shows an increase in 2015 ✔

c. both show a sudden drop at one point
OR
sudden drop earlier «Oct–Nov 14» in Liberia than in Guinea «Dec 14, Jan 15» ✔

d. Guinea fluctuates whereas Liberia rises to a peak and then decreases/no fluctuations ✔

e. epidemic starts earlier «in April 14» in Guinea than in Liberia «in June 14» ✔

f. epidemic peaks earlier «Sept 14» in Liberia than in Guinea «Dec 14» ✔

g. epidemic lasts longer in Guinea than it does in Liberia
OR
last case recorded in Liberia Feb 15 while cases continue «at least» until May 15 in Guinea ✔

h. numbers of cases in Guinea generally lower than in Liberia
OR
number of cases higher in Liberia than in Guinea ✔

Examiners report

Data is described rather than interpreted e.g. epidemic starts in April for Guinea and in June for Liberia instead of epidemic starts earlier in Guinea than in Liberia