9700_s03_qp_6

9700_s03_qp_6 - Centre Number Candidate Number Name...

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This document consists of 25 printed pages and 3 blank pages. SPA (SJF2886/TC) S43336/4 © UCLES 2003 [Turn over CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Advanced Level BIOLOGY 9700/06 Paper 6 Options May/June 2003 1 hour Additional Materials: Answer Paper READ THESE INSTRUCTIONS FIRST Write your Centre Number, Candidate Number and Name in the spaces at the top of this page and on all separate answer paper used. Write in dark blue or black pen. You may use a soft pencil for any diagrams, graphs or rough working. Do not use staples, paper clips, highlighters, glue or correction fluid. Answer the questions set on one of the options. Within your chosen option, write your answers to Questions 1 and 2 in the spaces provided on the Question Paper. Write your answer to Question 3 on the separate Answer Paper provided. The answer to Question 3 should be illustrated by large, clearly labelled diagrams wherever appropriate. At the end of the examination, 1. fasten all your work securely together; 2. enter the number of the option you have answered in the grid below. INFORMATION FOR CANDIDATES The number of marks is given in brackets [ ] at the end of each question or part question. The options are: 1 – Biodiversity (page 2) 2 – Biotechnology (page 9) 3 – Growth, Development and Reproduction (page 14) 4 – Applications of Genetics (page 20) Centre Number Candidate Number Name If you have been given a label, look at the details. If any details are incorrect or missing, please fill in your correct details in the space given at the top of this page. Stick your personal label here, if provided. OPTION ANSWERED FOR EXAMINER’S USE 1 2 3(a) 3(b) TOTAL
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2 9700/06/M/J03 OPTION 1 – BIODIVERSITY 1 (a) Describe what is meant by the term biodiversity. .......................................................................................................................................... .......................................................................................................................................... ..................................................................................................................................... [2] (b) Explain why tropical rainforest is considered to have a very high ecological importance. .......................................................................................................................................... .......................................................................................................................................... .......................................................................................................................................... ..................................................................................................................................... [3] In Mexico, coffee is an important crop. Coffee trees grow well in areas in which tropical rainforest is found and so the planting of coffee plantations frequently means that rainforest is destroyed. Table 1.1 shows four different coffee-growing systems that are used in Mexico and also the results of a survey into the number of different bird species found in each system. (c) With reference to Table 1.1, (i) explain the reasons for the pattern shown by the numbers of bird species in systems A , B , C and D ; ................................................................................................................................... ................................................................................................................................... .............................................................................................................................. [2] (ii) suggest reasons for the greater yield of coffee from system D than from system A ; ................................................................................................................................... ................................................................................................................................... .............................................................................................................................. [2] (iii) suggest why more pesticides are used in system D than in the other systems. ................................................................................................................................... ................................................................................................................................... .............................................................................................................................. [2] For Examiner’s Use
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3 9700/06/M/J03 [Turn over Table 1.1 coffee-growing system mean total number of bird species per unit area coffee and many other useful species grown beneath the original forest trees original forest trees removed and replaced with a mixture of other tall trees such as rubber; coffee and other crops grown beneath them A traditional polyculture or 'coffee garden' B commercial polyculture original forest trees removed and replaced with a single species of leguminous trees; only coffee trees grown beneath them
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This note was uploaded on 01/25/2012 for the course BIO alevels taught by Professor J.b during the Spring '11 term at Taylor's.

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9700_s03_qp_6 - Centre Number Candidate Number Name...

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