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Biology · 2007 · May · Paper 2 · HL · TZ1 · Question paper

BiologyQuestion paper2007HLMay

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This question paper is listed under Biology in the 2007 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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2207-6008 10 pages M07/4/BIOLO/HP2/ENG/TZ1/XX+ Monday 14 May 2007 (afternoon) biology HigHER lEvEl PaPER 2  IB DIPLOMA PROGRAMME PROGRAMME DU DIPLÔME DU BI PROGRAMA DEL DIPLOMA DEL BI 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 of Section A in the spaces provided. • Section B: answer two questions from Section B. Write your answers on answer sheets. Write your session number on each answer sheet, and attach them to this examination paper and your cover sheet using the tag provided. • At the end of the examination, indicate the numbers of the questions answered in the candidate box on your cover sheet and indicate the number of sheets used in the appropriate box on your cover sheet. 2 hours 15 minutes [Personal identifier removed] [Personal identifier removed] 0110 © IBO 2007 2207-6008 – 2 – M07/4/BIOLO/HP2/ENG/TZ1/XX+ SEction a Answer all the questions in the spaces provided. 1. Hummingbirds have long narrow beaks that adapt them to collecting nectar from flowers. Nectar provides energy in the form of sugar, but has very low concentrations of amino acids and protein. Therefore, hummingbirds have to supplement their diet by catching flying insects. They do this by flying with their beaks wide open towards insects. Scientists have used high-speed video to study the success rate for catching insects. The pie charts below show the results, according to which part of the beak the insect touches first. Key: Insect successfully caught and swallowed Insect lost 17% 83% 44% 56%65% 35% Base of beak Middle of beak Tip of beak [Source: Yanega, 2004, Nature, 428, page 615. Reprinted with the permission of the Company of Biologists.] (a) (i) State the relationship between the part of the beak that insects first touch and the success rate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [1] (ii) Suggest a reason for the relationship
File information
Subject
Biology
Document type
Question paper
Year
2007
Session
May
Level
HL
Paper
2
Examination zone
TZ1
Language
Not labelled in the archive
File size
252 KB
Pages
10
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