Biology · 2003 · November · Paper 2 · 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 2
Friday 14 November 2003 (afternoon)
2 hours 15 minutes
N03/410/H(2)
IB DIPLOMA PROGRAMME
PROGRAMME DU DIPLÔME DU BI
PROGRAMA DEL DIPLOMA DEL BI
c
883-135 9 pages
INSTRUCTIONS TO CANDIDATES
y Write your candidate number in the box above.
y Do not open this examination paper until instructed to do so.
y Section A: answer all of Section A in the spaces provided.
y Section B: answer two questions from Section B. Write your answers on answer sheets.
Write your candidate 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 numbers of the ques tions 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.
[Personal identifier removed]
SECTION A
Answer all the questions in the spaces provided.
1. The ozone layer in the atmosphere is an effective barrier to ultr aviolet A (UVA) and ultraviolet B
(UVB) light. UVA and UVB light penetrates the surface waters of the ocean and causes damage to
marine organisms. The most extensive destruc tion of the ozone layer occurs over Antarctica and
the Southern Ocean. This causes increased amounts of UVA and UVB light to reach Antarctic
marine environments.
Primary productivity is the rate of production of organic material as a result of photosynthesis. The
effect of light on the primary productivity of phytoplankton (mic roscopic photosynthetic
organisms) at various depths wa s investigated in the Antarctic Ocean. Primary productivity was
measured under three conditions:
* full sunlight
* sunlight with UVB removed using a suitable filter
* sunlight with both UVB and UVA removed using a suitable filter.
31mg C fixed m dPrimary productivity /
− −
Depth / m
02 0 4 0 6 0
0
5
10
15
20
25
Key
full sunlight
sunlight with UVB removed
sunlight with UVB and UVA removed
[Source: D Karentz and I Bosch 2001, Amer Zoo, 41, pages 3–16]
[1](a) Measure the level of primary productivity at a depth of 5 m under full sunlight.
.........................................................................
[2](b) Outline the effect of depth
File information
Subject
Biology
Document type
Question paper
Year
2003
Session
November
Level
HL
Paper
2
Examination zone
Not labelled in the archive
Language
Not labelled in the archive
File size
128 KB
Pages
9
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