June 2020 QP

Please write clearly in block capitals. Centre number Candidate number Surname Forename(s) Candidate signature I declare this is my own work. H GCSE BIOLOGY Higher Tier Paper 1 H Tuesday 12 May 2020 Afternoon Time allowed: 1 hour 45 minutes Materials For Examiner’s Use For this paper you must have: • a ruler Question Mark • a scientific calculator. 1 Instructions 2 • Use black ink or black ball-point pen. 3 • Pencil should only be used for drawing. 4 • Fill in the boxes at the top of this page. 5 • Answer all questions in the spaces provided. • If you need extra space for your answer(s), use the lined pages at the end of 6 this book. Write the question number against your answer(s). 7 • Do all rough work in this book. Cross through any work you do not want TOTAL to be marked. • In all calculations, show clearly how you work out your answer. 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. * jun20 84611H01 * 8461/1H IB/M/Jun20/E23

Please write clearly in block capitals. Centre number Candidate number Surname Forename(s) Candidate signature I declare this is my own work. H GCSE BIOLOGY Higher Tier Paper 1 H Tuesday 12 May 2020 Afternoon Time allowed: 1 hour 45 minutes Materials For this paper you must have: For Examiner’s Use • a ruler Question Mark • a scientific calculator. 1 Instructions 2 • Use black ink or black ball-point pen. 3 • Pencil should only be used for drawing. 4 • Fill in the boxes at the top of this page. 5 • Answer all questions in the spaces provided. • If you need extra space for your answer(s), use the lined pages at the end of 6 this book. Write the question number against your answer(s). 7 • Do all rough work in this book. Cross through any work you do not want to be marked. TOTAL • In all calculations, show clearly how you work out your answer. 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. * jun20 84611H01 * 8461/1H IB/M/Jun20/E23

2 Do not write outside the Answer all questions in the spaces provided. box 0 1 This question is about photosynthesis. 0 1 . 1 Complete the word equation for photosynthesis. [2 marks] → + + oxygen 0 1 . 2 Describe how energy for the photosynthesis reaction is gained by plants. [2 mark s ] Students investigated the effect of temperature on the rate of photosynthesis. The students shone light from a lamp onto pondweed and measured the volume of oxygen produced per hour. Table 1 shows the results. Table 1 Rate of photosynthesis in cm 3 /hour Temperature in °C Test 1 Test 2 Test 3 Mean 20 18.5 19.3 19.5 X 25 32.6 34.1 32.9 33.2 30 41.9 45.2 44.9 44.0 35 38.6 39.8 44.0 40.8 40 23.1 20.5 22.4 22.0 45 1.9 14.2 2.2 2.1 * 02 * IB/M/Jun20/8461/1H

2 Do not write outside the Answer all questions in the spaces provided. box 0 1 This question is about photosynthesis. 0 1 . 1 Complete the word equation for photosynthesis. [2 marks] + → + oxygen 0 1 . 2 Describe how energy for the photosynthesis reaction is gained by plants. [2 mark s ] Students investigated the effect of temperature on the rate of photosynthesis. The students shone light from a lamp onto pondweed and measured the volume of oxygen produced per hour. Table 1 shows the results. Table 1 Rate of photosynthesis in cm 3 /hour Temperature in °C Test 1 Test 2 Test 3 Mean 20 18.5 19.3 19.5 X 25 32.6 34.1 32.9 33.2 30 41.9 45.2 44.9 44.0 35 38.6 39.8 44.0 40.8 40 23.1 20.5 22.4 22.0 45 1.9 14.2 2.2 2.1 * 02 * IB/M/Jun20/8461/1H

3 Do not write outside the 0 1 Calculate mean value . 3 X . box [ 2 marks ] X = cm 3 /hour The students identified one anomalous result in Table 1 . 0 1 Draw a ring around the anomalous result in . 4 Table 1 . [ 1 mark ] 0 1 . 5 Suggest one possible cause of the anomalous result. [ 1 mark ] 0 1 . 6 How did the students deal with the anomalous result? [ 1 mark ] 0 1 . 7 Give one factor the students should have kept constant in this investigation. [ 1 mark ] Turn over ► * 03 * IB/M/Jun20/8461/1H

3 Do not write outside the 0 1 . 3 Calculate mean value X . box [ 2 marks ] X = cm 3 /hour The students identified one anomalous result in Table 1 . 0 1 . 4 Draw a ring around the anomalous result in Table 1 . [ 1 mark ] 0 1 . 5 Suggest one possible cause of the anomalous result. [ 1 mark ] 0 1 . 6 How did the students deal with the anomalous result? [ 1 mark ] 0 1 . 7 Give one factor the students should have kept constant in this investigation. [ 1 mark ] Turn over ► * 03 * IB/M/Jun20/8461/1H