DP Biology (first assessment 2025)

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Question 19N.2.SL.TZ0.1e

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Date November 2019 Marks available [Maximum mark: 3] Reference code 19N.2.SL.TZ0.1e
Level SL Paper 2 Time zone TZ0
Command term Evaluate Question number e Adapted from N/A
e.
[Maximum mark: 3]
19N.2.SL.TZ0.1e
(e)

Evaluate the effect of the change in distribution of the different life stages of ticks on the spread of Lyme disease in south-eastern Canada.

[3]

Markscheme

a. nymphs present through most of year/longer period/from March to November/through spring and summer «so more risk of infection» ✔

b. more adults in winter/in January/February so more risk of infection then ✔

c. infection will be possible through more/most months of/throughout the year ✔

d. Lyme disease likely to/will increase ✔

Syllabus sections