Gcse Biology Question Paper Unit 03 Biology June 2016-Books Pdf

GCSE Biology Question paper Unit 03 Biology June 2016
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2 Do not write,outside the,Answer all questions in the spaces provided. 1 Cells tissues and organs are adapted to take in different substances and get rid of. different substances, Table 1 shows the concentration of four ions outside cells and inside cells. Concentration outside cells Concentration inside cells. in mmol per dm3 in mmol per dm3,Sodium 140 9,Potassium 7 138. Calcium 2 27,Chloride 118 3, 1 a Use information from Table 1 to complete the following sentences. Sodium ions will move into cells by the process, Potassium ions will move into cells by the process.
1 b Some students investigated the effect of the different concentrations of sugar in. four drinks A B C and D on the movement of water across a partially permeable. The students, made four bags from artificial partially permeable membrane. put equal volumes of 5 sugar solution in each bag,weighed each bag containing the sugar solution. placed one bag in each of the drinks A B C and D, after 20 minutes removed the bags containing the sugar solution and. weighed them again,G Jun16 BL3HP,3 Do not write,outside the. Figure 1 shows how they set up the investigation,Boiling tube.
Artificial partially,permeable membrane,bag tied at both. 5 sugar solution,0 1 sugar 4 2 sugar 6 9 sugar 10 6 sugar. solution solution solution solution, 1 b i The bag in drink A got heavier after 20 minutes. Explain why, 1 b ii In which drink A B C or D would you expect the bag to show the smallest change in. Tick one box, 1 b iii Explain why you think the bag you chose in part b ii would show the smallest change.
G Jun16 BL3HP,4 Do not write,outside the, 2 a Carbon dioxide enters a plant through stomata on the leaves. Name the cells that control the size of the stomata. 2 b Scientists grew tomato plants in air containing different concentrations of. carbon dioxide, The scientists recorded the number of stomata found on the lower surface of the. leaves of plants grown at each carbon dioxide concentration. Figure 2 shows the results,of stomata 10,0 1 2 3 4 5 6 7 8 9 10 11 12 13. Concentration of carbon dioxide in arbitrary units. G Jun16 BL3HP,5 Do not write,outside the, 2 b i Describe the relationship between the mean number of stomata per mm2 and. carbon dioxide concentration, 2 b ii Suggest a reason for the relationship you described in part b i.
2 c i Suggest one disadvantage to a plant of having a large number of stomata per mm2. on each leaf, 2 c ii Suggest one environmental condition where a large number of stomata per mm2. on each leaf would be a disadvantage,Turn over for the next question. G Jun16 BL3HP,6 Do not write,outside the, 3 In this question you will be assessed on using good English organising. information clearly and using specialist terms where appropriate. Plants transport many substances between their leaves and roots. Figure 3 shows the direction of movement of substances through a plant. Cross section,through stem Phloem,G Jun16 BL3HP,7 Do not write. outside the, Describe how ions water and sugar are obtained and transported through plants.
In your answer you should refer to materials moving upwards in a plant and to materials. moving downwards in a plant,Extra space,G Jun16 BL3HP. 8 Do not write,outside the, 4 Figure 4 shows the amount of forest cover on an island in Asia in 1973 and in 2010. Forest cover in 1973 Forest cover in 2010,Forest 0 250 km. 4 a i Deforestation has decreased the amount of forest cover on the island. Describe the change in the pattern of forest cover on the island. 4 a ii Give two possible reasons why the amount of forest has decreased between. 1973 and 2010,G Jun16 BL3HP,9 Do not write,outside the. 4 b Scientists are concerned about the effects of a decrease in forest cover on ecosystems. Give two possible negative effects of the decrease in forest cover on ecosystems. Turn over for the next question,G Jun16 BL3HP,10 Do not write.
outside the, 5 When we breathe in and breathe out the ribs and the diaphragm move. 5 a Complete Table 2 to describe the changes that occur when we breathe in. Movement of the Movement of the Change in volume,ribs diaphragm of the thorax. Breathing in up and out, 5 b Emphysema is a disease affecting the lungs People with emphysema are often short. of breath and find exercise difficult, Figure 5 shows an alveolus from a person without emphysema and an alveolus from a. person with emphysema,Alveolus from person Alveolus from person.
without emphysema with emphysema, 5 b i Describe one difference between the alveolus from a person without emphysema and. the alveolus from a person with emphysema,G Jun16 BL3HP. 11 Do not write,outside the, 5 b ii Explain how the difference you described in part b i causes the person with. emphysema to find exercise difficult,Turn over for the next question. G Jun16 BL3HP,12 Do not write,outside the, 6 The circulatory system contains arteries and veins.
6 a i Describe how the structure of an artery is different from the structure of a vein. 6 a ii A comparison is made between blood taken from an artery in the leg and blood taken. from a vein in the leg, Give two differences in the composition of the blood. G Jun16 BL3HP,13 Do not write,outside the, 6 b During operations patients can lose a lot of blood Patients often need blood. transfusions to keep them alive, Figure 6 shows information about a new artificial blood product. Sea worms give hope for people in need of blood transfusions. Scientists have carried out a five year trial using a new artificial blood product. The scientists have used a protein from sea worms to create the new artificial. blood and the results from the trial are very positive Thousands of sea. worms can be grown and collected, During the trial mice were given blood transfusions of the artificial blood The. bodies of the mice tolerated the artificial blood and the artificial blood did not. cause any side effects, Suggest two possible advantages of using the new artificial blood instead of using.
human blood for a transfusion in humans,Turn over for the next question. G Jun16 BL3HP,14 Do not write,outside the, 7 Humans keep their internal conditions almost constant. Body temperature is kept within a narrow range, When the core body temperature is too low this is detected by the thermoregulatory. centre in the brain, Describe how the body responds when a decrease in core body temperature. is detected,G Jun16 BL3HP,15 Do not write,outside the.
Turn over for the next question,DO NOT WRITE ON THIS PAGE.


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