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Biology · 2018 · May · Paper 2 · HL · TZ1 · Question paper

BiologyQuestion paper2018HLMay

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This question paper is listed under Biology in the 2018 examination archive. Its catalogue level is HL. The catalogue session is May. The information below helps you identify the document before opening the complete PDF. Subject, year and session labels come from the archive catalogue; the original cover remains the reference if a label differs. A file is not automatically suitable for your current syllabus simply because its subject name matches.

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[Personal identifier removed] Higher level Paper 2 20 pages Monday 14 May 2018 (afternoon) 2 hours 15 minutes Instructions to candidates • Write your session number in the boxes above. • Do not open this examination paper until instructed to do so. • Section A: answer all questions. • Section B: answer two questions. • Answers must be written within the answer boxes provided. • A calculator is required for this paper. • The maximum mark for this examination paper is [72 marks]. © International Baccalaureate Organization 2018 M18/4/BIOLO/ HP2/ENG/TZ1/XX 2218 – 6008 20EP01 Section A Answer all questions . Answers must be written within the answer boxes provided . 1. White-nose syndrome (WNS) is a disease caused by the fungus Geomyces destructans . This kills bats from many species during their winter hibernation . Scientists used echolocation to record the number of bat fl ights over a station in 10 minute sample periods during the summers of 2007 to 2009. The graph shows the mean number of fl ights and number of recording samples for little brown bats (Myotis lucifugus), a species aff ected by the fungus, along with those of hoary bats (Lasiurus cinereus), which are not aff ected. 2007 79 2008 151 2009 144 Year: Samples: 0 5 10 15 20 25 30 35 40 Mean number of bats flying in 10 minute sample periods Myotis lucifugus (affected) Lasiurus cinereus (unaffected) Key: [Source: Adapted from Dzal, Yvonne, et al., Going, going, gone: the impact of white-nose syndrome on the summer activity of the little brown bat (Myotis lucifugus), Biology Letters (2011), 7, p. 393. http://rsbl.royalsocietypublishing.org/content/7/3/392. Permission conveyed through Copyright Clearance Center, Inc .] (a) Calculate the total number of M. lucifugus fl ights that were recorded in the summer of 2007 . [1] . . . . . . . . . . . . . . . . . (b) Suggest one limitation of this recording method in determining the accurate mean number of individual bats fl ying. [1] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
File information
Subject
Biology
Document type
Question paper
Year
2018
Session
May
Level
HL
Paper
2
Examination zone
TZ1
Language
Not labelled in the archive
File size
1.5 MB
Pages
20
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