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Question 17N.3.HL.TZ0.a.i

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Date November 2017 Marks available [Maximum mark: 1] Reference code 17N.3.HL.TZ0.a.i
Level HL Paper 3 Time zone TZ0
Command term Identify Question number a.i Adapted from N/A
a.i.
[Maximum mark: 1]
17N.3.HL.TZ0.a.i

To assess the impact of introduced cats (Felis silvestris) that prey on native species, a study was carried out on 120 islands around the world. The graph shows the impact of F. silvestris on reptiles, birds and mammals.

[Source: A global review of the impacts of invasive cats on island endangered vertebrates, F. M. Medina et al. (2011) Global Change Biology, 17, pp. 3503–3510. Reproduced with permission from John Wiley and Sons.]

Identify how the pattern in mammals is different from reptiles and birds.

[1]

Markscheme

a. more extinct than endangered «in mammals as opposed to reptiles and birds»

b. total percentage extinct plus endangered mammals lower than reptiles and birds

[Max 1 Mark]

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