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UK GCSE 2007 : Foundation Tier, Biology Paper 1

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Centre Number 71 Candidate Number General Certificate of Secondary Education 2007 Paper 1 Foundation Tier G0901 Science: Biology [G0901] THURSDAY 31 MAY, MORNING TIME 1 hour. INSTRUCTIONS TO CANDIDATES Write your Centre Number and Candidate Number in the spaces provided at the top of this page. Write your answers in the spaces provided in this question paper. Answer all fourteen questions. For Examiner s use only Question Number 1 2 3 4 5 6 INFORMATION FOR CANDIDATES The total mark for this paper is 80. Quality of written communication will be assessed in question 14(b). Figures in brackets printed down the right-hand side of pages indicate the marks awarded to each question or part question. 7 8 9 10 11 12 13 14 Total Marks G091F7 2714 Marks 1 The drawings show three animals. Examiner Only Marks A Remark B C (a) Name the group to which each animal belongs. A ___________________________ [1] B ___________________________ [1] C ___________________________ [1] (b) Give one feature, visible in the drawings, which animals A and C have in common. __________________________________ [1] B and C have in common. __________________________________ [1] G091F7 2714 2 [Turn over 2 Complete the table by choosing a sampling method from the list. Examiner Only Marks pitfall trap (a) Sampling method pooter quadrat Remark net Suitable organisms Ground beetle Small fish in a pond Greenfly on the underside of a leaf [3] (b) Describe how to use a quadrat to sample the daisy plants in a lawn. __________________________________________________________ __________________________________________________________ __________________________________________________________ _______________________________________________________ [2] G091F7 2714 3 [Turn over 3 The table shows the height of 15-year-old pupils. Examiner Only Marks Pupil Sex Height/cm 1 Female 159 2 Female 160 3 Female 162 4 Female 164 5 Female 165 6 Male 166 7 Male 169 8 Male 170 9 Male 171 10 Male 174 TOTAL Remark 1660 (a) Calculate the average height. Show your working. Average height _________________ cm [2] (b) Describe the difference between the heights of male and female pupils. _________________________________________________________ ______________________________________________________ [1] (c) Give one factor which causes this variation in height in humans. __________________________ [1] (d) Name the type of variation shown by height. __________________________ [1] G091F7 2714 4 [Turn over 4 During bread making yeast respires and produces alcohol. Examiner Only Marks Remark (a) What type of micro-organism is yeast? __________________________ [1] (b) Explain why bread rises. _________________________________________________________ _________________________________________________________ ______________________________________________________ [2] (c) What happens to the yeast when the bread is baked? ______________________________________________________ [1] (d) Suggest why baked bread does not contain alcohol. ______________________________________________________ [1] G091F7 2714 5 [Turn over 5 The graph shows the growth of a population of bacteria. Examiner Only Marks Remark 90 Number of organisms in unit of culture 80 70 60 50 40 30 A 20 10 0 0 2 4 6 8 10 12 14 16 18 Time/days Source: Longman Biology 11 14 Williams & Workman, 2002 (a) State on which day the number of bacteria reached a maximum. Day _________ [1] 40 per unit of culture. Day _________ [1] (b) Use the terms birth rate and death rate to explain the growth of the population of bacteria over region A. ______________________________________________________ [1] (c) Give two reasons why the number of bacteria decrease after 14 days. _________________________________________________________ _________________________________________________________ ______________________________________________________ [2] G091F7 2714 6 [Turn over 6 (a) What is cancer? Examiner Only Marks Remark _________________________________________________________ ______________________________________________________ [1] The diagram shows a cancer tumour. Cancer cell Normal cell Blood vessel Blood flow (b) Use the diagram to help explain why this is a malignant cancer. _________________________________________________________ _________________________________________________________ ______________________________________________________ [2] (c) Give the environmental trigger which causes skin cancer. ______________________________________________________ [1] (d) Name the form of treatment which uses drugs to kill cancer cells. __________________________ [1] G091F7 2714 7 [Turn over 7 The diagram shows part of a woodland food web. Examiner Only Marks Remark tawny owl blue tit stoat squirrel greenfly woodmouse hazelnuts moth larvae bark leaves Source: Longman Biology 11 14 Williams & Workman, 2002 (a) Name a producer from this food web. __________________________ [1] (b) Use this food web to complete the food chain. leaves greenfly Examiner Only Marks Remark [3] (c) Name an animal that feeds at the second trophic level in this food chain. __________________________ [1] (d) Explain why the number of woodmice may decrease if all the squirrels were removed from the woodland. _________________________________________________________ ______________________________________________________ [1] G091F7 2714 8 [Turn over 8 Examiner Only The diagram shows part of the carbon cycle. Marks Remark A decay Atmospheric carbon dioxide Green plants d ec B ay ea te n B D comb t io us C n Fossil plants [1] Source: D. G. Mackean. 1981. Life Study. John Murray (Publishers) Ltd. (a) Complete box D and name processes A, B and C. A __________________________ [1] B __________________________ [1] C __________________________ [1] (b) Use the diagram to help suggest why the concentration of carbon dioxide in the atmosphere has increased during the last 30 years. _________________________________________________________ _________________________________________________________ ______________________________________________________ [2] G091F7 2714 9 [Turn over 9 The diagram shows a plant cell. Examiner Only Marks Remark D A B C Source: R. McIlwaine, J. Napier, GCSE BIOLOGY for CCEA, Hodder & Stoughton, 2003 (a) Name parts A, B and C. A __________________________ [1] B __________________________ [1] C __________________________ [1] (b) Give the function of D. _________________________________________________________ _________________________________________________________ ______________________________________________________ [2] G091F7 2714 10 [Turn over BLANK PAGE (Questions continue overleaf) G091F7 2714 11 [Turn over 10 The diagrams show some steps used when growing bacteria. Examiner Only Marks Step 1 Flame a wire loop. Remark Step 2 Cool the wire loop. Flame the neck of a tube of broth containing bacteria. Step 4 Transfer some of the bacteria onto a Petri dish of sterile agar. Step 3 Take a sample of bacteria on the wire loop. Source: J. Taylor, (1990), Micro-organisms and Biotechnology, Macmillan Educational Ltd. (a) Explain why the wire loop is heated in Step 1. _________________________________________________________ ______________________________________________________ [1] cooled in Step 2. _________________________________________________________ ______________________________________________________ [1] (b) Explain why the lid of the Petri dish is at an angle in Step 4. _________________________________________________________ ______________________________________________________ [1] G091F7 2714 12 [Turn over (c) Suggest why Petri dishes containing bacteria are placed in an incubator at 20 C for 48 hours. Examiner Only Marks Remark _________________________________________________________ _________________________________________________________ ______________________________________________________ [2] (d) What term is used to describe the technique used when carrying out the procedures shown in the diagrams? __________________________ [1] G091F7 2714 13 [Turn over 11 The graph shows the percentage of people in the UK taking enough exercise. Percentage taking enough exercise 60 50 Men 40 Women 30 20 10 0 16 24 25 34 35 44 45 54 Age/years 55 64 65 74 75+ Source:Adapted from www.statistics.gov.uk Examiner Only Marks Remark (a) Calculate the ratio of men to women who take enough exercise in the 16 24 age group. Show your working. Answer __________________________ [2] Lack of exercise is an important factor causing obesity and increasing the risk of a heart attack. (b) Give two other factors that increase the risk of having a heart attack. 1. ____________________________________________________ [1] 2. ____________________________________________________ [1] (c) Explain how obesity can cause a heart attack. _________________________________________________________ _________________________________________________________ ______________________________________________________ [2] G091F7 2714 14 [Turn over 12 (a) Complete the table. Examiner Only Marks Disease Cause Gonorrhoea Prevention Droplet through the air from infected person Rubella Spread MMR vaccination Droplet through the air from infected person Remark BCG vaccination Bacteria Bacteria [4] If a mother catches rubella or eats a poor diet during pregnancy it can affect her baby. (b) Suggest two other ways the behaviour of a mother may affect her baby during pregnancy. _________________________________________________________ _________________________________________________________ ______________________________________________________ [2] (c) Give one advantage to the baby of breast feeding. _________________________________________________________ ______________________________________________________ [1] G091F7 2714 15 [Turn over 13 An experiment was set up as shown in the diagram. Examiner Only Marks Remark Colour change of hydrogen carbonate indicator Low High Red Yellow Purple CO2 CO2 Hydrogen carbonate indicator was used to test for carbon dioxide. Bright light Tube A Tube B Tube C Leaf Tinfoil Muslin Hydrogen carbonate indicator (a) Complete the table. Tube Amount of light received by plant Colour of indicator after 24 hours Photosynthesis A Bright Purple YES B Dim Red Respiration YES C NO YES [4] (b) Explain why the indicator changed from red to purple in tube A. _________________________________________________________ _________________________________________________________ ______________________________________________________ [2] G091F7 2714 16 [Turn over 14 The diagram shows a stage during the birth of a baby. Examiner Only Marks Remark B A C (a) Name parts A, B and C. A __________________________ [1] B __________________________ [1] C __________________________ [1] (b) Describe the process of birth. The quality of written communication will be assessed in this question. _________________________________________________________ _________________________________________________________ _________________________________________________________ _________________________________________________________ _________________________________________________________ _________________________________________________________ ______________________________________________________ [3] Quality of written communication G091F7 2714 [2] 17 [Turn over THIS IS THE END OF THE QUESTION PAPER G092F6 703 18 [Turn over [Turn over Permission to reproduce all copyright material has been applied for. In some cases, efforts to contact copyright holders may have been unsuccessful and CCEA will be happy to rectify any omissions of acknowledgement in future if notified. S 7/06 7-117-1

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