EXMINTINS CUNCIL F SWZILND in collaboration with UNIVERSITY F CMRIDGE INTERNTINL EXMINTINS Swaziland General Certificate of Secondary Education *7129710043* ILGY 6884/05 Paper 5 lternative to Practical Test ctober/november 2011 1 hour 30 minutes Candidates answer on the Question Paper. No dditional Materials are required. RED THESE INSTRUCTINS FIRST Write your Centre number, candidate number and name on all the work you hand in. Write in dark blue or black pen. You may use a soft pencil for any diagrams, graphs, tables or rough working. Do not use staples, paper clips, highlighters, glue or correction fluid. nswer all questions. Write your answers in the spaces provided on the question paper. You may use a calculator. t the end of the examination, fasten all your work securely together. The number of marks is given in brackets [ ] at the end of each question or part question. 1 2 3 4 Total This document consists of 9 printed pages and 3 blank pages. DC (NF/CGW) 35036/3 [Turn over
1 Fig. 1.1a shows a setup of an experiment of a spinach leaf placed in red coloured solution for 15 minutes. The stem was then taken out of the solution and cut longitudinally. The results are shown in Fig. 1.1b. 2 red Fig. 1.1a Fig. 1.1b (a) Name the tissue that is coloured red in the leaf stalk.... [1] (b) State two functions of the coloured tissue and explain how it is adapted for each function. function 1... explanation... function 2... explanation... [4]
3 (c) Describe an experiment you could carry out to compare the rate of uptake of coloured solution in the spinach leaf with another leaf from a different species.... [5] (d) Describe how you would test the spinach leaf for starch.... [3] [Total: 13] [Turn over
2 Fig. 2.1 shows two leaves C and D. Leaf C has been cut to show the leaf in cross section. 4 leaf C leaf D Fig. 2.1 (a) State three natural differences between leaf C and leaf D in Fig. 2.1.... [3] (b) Draw a large labelled diagram of the cross section (cut section) of leaf C. [6]
(c) (i) (ii) 5 Measure the width of C as indicated in Fig. 2.1 and the corresponding width in your drawing to the nearest millimetre. width of C... width of drawing... [2] Calculate the magnification of your drawing. Show your working. Magnification... [2] (d) Leaves C and D were put in hot water and air bubbles were observed forming on the leaves surfaces. (i) Describe and explain the source of the air bubbles in the leaf structure................ [3] (ii) More air bubbles were observed on one side of the leaves than on the other. Explain why more bubbles were formed on one side of the leaf than the other.......... [2] [Total: 18] [Turn over
3 Fig. 3.1 shows a river with human activities next to it. 6 Point Point factory with chemical effluent farmer using fertiliser Point C dead fish Fig. 3.1 (a) Suggest possible substances that could be killing the fish down the river in Fig. 3.1... [2] (b) Samples of water were taken from points, and C to investigate where the poisonous substance killing the fish came from. Live fish were put into the three samples of water. fter a period of time the fish in sample were still alive. ll the fish in samples and C were dead. State and explain, using the results above, if the factory, the farmer or both are responsible for the death of the fish.... [4]
(c) Describe the effects of poisoning the fish on the food chain in the river. 7... [3] (d) Describe how the use of the fertilizer has improved food production.... [3] (e) ne of the gases released from the factory is carbon dioxide. Describe the test and identification of carbon dioxide.... [2] [Total: 14] [Turn over
4 Fig. 4.1 shows 45 samples of blood being tested for blood groups in the laboratory. 8 Pos Pos Pos Pos Pos Fig. 4.1 (a) Complete Table 4.1 to show the total number of people for each blood group. Table 4.1 lood group Number of people [3]
(b) Draw a bar chart from your table to show the number of people in each blood group. 9 [5] (c) State the type of variation represented by blood groups.... [1] (d) The blood samples were randomly taken from a town with a population of 10,000 people. Estimate the number of people who are positive in the town.... [3] (e) Name three blood components that could be found in the blood samples. 1... 2... 3... [3] [Total: 15]
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