Biology · 2003 · November · Paper 3 · HL · Question paper
BiologyQuestion paper2003HLNovember
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This question paper is listed under Biology in the 2003 examination archive. Its catalogue level is HL. The catalogue session is November. 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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BIOLOGY
HIGHER LEVEL
PAPER 3
Monday 17 November 2003 (morning)
1 hour 15 minutes
N03/410/H(3)
c
IB DIPLOMA PROGRAMME
PROGRAMME DU DIPLÔME DU BI
PROGRAMA DEL DIPLOMA DEL BI
883-136 19 pages
[Personal identifier removed]
y Write your candidate number in the box above.
y Do not open this examination paper until instructed to do so.
y Answer all of the questions from two of the Options in the spaces provided. You may continue
your answers on answer sheets. Write your ca ndidate number on each answer sheet, and attach
them to this examination paper and your cover sheet using the tag provided.
y At the end of the examination, indicate the letters of the Options answered in the candidate box
on your cover sheet and indicate the number of answer sheets used in the appropriate box on
your cover sheet.
Option D – Evolution
D1. The mechanisms of speciation in ferns have been studied in temperate and tropical habitats. One
group of three species from the genus Polypodium lives in rocky areas in temperate forests in North
America. Members of this group have similar morphology (form and structure). Another group of
four species from the genus Pleopeltis live at different altitudes in tropical mountains in Mexico
and Central America. Members of this group are morphologically distinct.
Data from the different species within each group was compared in order to study the mechanisms
of speciation.
Genetic identity was determined by comparing the similarities of certain proteins and genes in each
species. Values between 0 and 1 were assigned to pairs of species to indicate the degree of
similarity in genetic identity. A value of 1 would mean that all the genetic factors studied were
identical between the species being compared.
Fig. 1:
The approximate distribution in
North America of the three species
of Polypodium (Po.) and a summary
of genetic identity.
Po. appalachianum
Po. amorphum
Po. sibiricum
0.435
0.338
0.608
Fig. 2: The approximate distribution in Central America and Mexico of the four species of Pleopeltis (Pl.)
and a summary of genetic identity.
[Source: C Haufler, E Hooper and J Therrien, (2000), Plant Species Biology, 15, pages 223–236]
Pl. conzattii
Pl. polyepis
File information
Subject
Biology
Document type
Question paper
Year
2003
Session
November
Level
HL
Paper
3
Examination zone
Not labelled in the archive
Language
Not labelled in the archive
File size
311 KB
Pages
19
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