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Download AQA GCSE BIOLOGY Higher Tier Paper 2H 2026 Questions Combined with FULL MARKING SCHEME and more Exams Medicine in PDF only on Docsity!
AQA GCSE BIOLOGY Higher Tier Paper 2H 2026 Questions Combined with FULL MARKING SCHEME Please write clearly in block capitals. Centre number Candidate number Sumame Forename(s) Candidate signature GCSE BIOLOGY Higher Tier Paper 2H | declare this is my own work. Monday 9 June 2025 Morning Time allowed: 1 hour 45 minutes Materials For this paper you must have: * aruler Question Mark * ascientific calculator. For Examiner's Use Instructions e Use black ink or black ball-point pen. Pencil should only be used for drawing. Fill in the boxes at the top of this page. Answer all questions in the spaces provided. If you need extra space for your answer(s), use the lined pages at the end of this book. Write the question number against your answer(s). Do all rough work in this book. Cross through any work you do not want to be marked. ¢ Inall calculations, show clearly how you work out your answer. e|Ni/oalalale/rn|a TOTAL Information ¢ The maximum mark for this paper is 100. ¢ The marks for questions are shown in brackets. « You are expected to use a calculator where appropriate. « You are reminded of the need for good English and clear presentation in your answers. JUN2584612H01 euesreanoes 8461/2H [3] Table 4 gives the classification of the ichthyosaur in Figure 1. Table 1 Classification group Name Kingdom Animalia Chordata Class Reptilia Order Ichthyosauria Ichthyosauridae Genus Ichthyosaurus Species intermedius Complete Table 1. [2 marks] Choose answers from the box. Community Family Mammal Phylum Population [4] Ichthyosaurs were predators. Ichthyosaurs are now extinct. Scientists think that extinction of the ichthyosaurs was caused by increased competition with other predators for food. Suggest two other possible causes of extinction of the ichthyosaurs. [2 marks] a3 Turn over > IB/G/Jun25/8461/2H Do not write outside the box Students investigated how many daisy plants were growing in afield at different distances from a tree. This is the method used. 1. Place a 20-metre tape measure on the ground, with the tree at 0 metres. 2. Place a 1 m? quadrat on the ground every 4 metres along the tape measure. 3. Count the number of daisy plants in each quadrat. 4. Take a soil sample from each quadrat to find the percentage of water in the soil. Figure 2 shows the tree and the tape measure. Figure 2 0 2 4 6 8 10 12 14 16 18 20 metres This is the method used for finding the percentage of water in each soil sample (step 4): 5. Weigh an empty container. 6. Place the soil sample in the container and weigh again. 7. Heat the container of soil in an oven at 100 °C for several hours. 8. Allow the container of soil to cool and weigh again. 9. Repeat steps 7 and 8 until there is no further change in mass. a3 IB/G/Jun25/8461/2H Do not write outside the box Do not write outside the ‘box Table 2 shows the results. Table 2 Distance from the tree in metres 4 8 12 16 20 Mass of fresh soil in grams 250 266 260 248 252 Mass of dried soil in grams 225 234 209 184 181 Mass of water lost from soil in grams 25 32 51 64 71 Percentage of water in soil 10 12 20 26 x Number of daisies per m? 0 7 15 28 32 [2] Calculate percentage X in Table 2. Give your answer to the nearest whole number. [3 marks] Percentage X (nearest whole number) = % [3] Describe the effect of distance from the tree on the percentage of water in the soil between 4 metres and 16 metres. Use Table 2. [1 mark] IB/G/Jun25/8461/2H a3 Do not write outside the [4] Astudent concluded: box ‘As the water content of the soil increases, so does the number of daisy plants.’ Describe two changes to the investigation that would increase the validity of the student’s conclusion. [2 marks] [5] The percentage of water in the soil is an abiotic factor. Suggest three other abiotic factors that might have caused more daisy plants to grow further away from the tree. Do not refer to water in your answer. [3 marks] Turn over for the next question Turn over > IB/G/Jun25/8461/2H a3 Do not write outside the box Extra space Question 3 continues on the next page Turn over > a3 IB/G/Jun25/8461/2H 10 Plant responses are controlled by hormones. [3] Which hormone controls a plant’s response to the direction of light? [1 mark] [4] How does the hormone you named in Question 03.3 control the plant’s response to the direction of light? [1 mark] Tick (W) one box. All parts of the plant have the same concentration of hormone. The hormone has an effect when it breaks down. There is an uneven distribution of the hormone. [5] Explain how a plant’s response to light helps the plant survive. [3 marks] Do not write outside the ‘box IB/G/Jun25/8461/2H a3 12 Scientists can use genetic engineering to make hGH. Figure 4 shows a summary of the process. Figure 4 Human DNA Several steps hGH gene using enzymes and plasmids Bacterium containing hGH gene hGH released into culture medium [3] Describe how scientists can transfer the gene for hGH from human cells to bacterial cells. Use information from Figure 4. [4 marks] Extra space a3 IB/G/Jun25/8461/2H Do not write outside the ‘box 13 Do not write outside the [4] Growth hormone (GH) can be extracted from the urine of farm animals. _ Itis better to use hGH made by genetic engineering than to use GH from the urine of farm animals. Suggest two reasons why. Do not refer to ethical reasons or religious beliefs in your answer [2 marks] Turn over for the next question Turn over > IB/G/Jun25/8461/2H a3 15 [3] Explain how the destruction of peat bogs can affect biodiversity: « inthe local area © globally. [6 marks] Extra space Turn over for the next question a3 Turn over > IB/G/Jun25/8461/2H Do not write outside the box 16 Do not write outside the New cells are produced by cell division. box Figure 5 shows sperm formation in a human. Figure 5 4ONS ee © © c Growth Cell division 2 oo” © / E\ / F\s————_ Cell division 3 SO G8 | | | — Cell differentiation Sperm cells a3 IB/G/Jun25/8461/2H 18 Strawberry plants can reproduce both sexually and asexually. Figure 6 shows a strawberry plant reproducing: © sexually using flowers, fruits and seeds * asexually using horizontal stems called runners. Figure 6 Flowers a Offspring plants [5] Explain why the offspring produced using runners are genetically identical. [2 marks] IB/G/Jun25/8461/2H a3 Do not write outside the ‘box 19 Do not write outside the [6] Explain why the offspring produced using flowers, fruits and seeds box are not genetically identical. [2 marks] Describe two advantages of asexual reproduction for the survival of strawberry plants. [2 marks] 1 2 [8 | Describe two advantages of sexual reproduction for the survival of strawberry plants. [2 marks] 1 2 12 Turn over for the next question a3 Turn over > IB/G/Jun25/8461/2H 
