June 2018 QP.cleaned

PMT PMT Check Point Threat Extraction secured this document Get Original Please write clearly in block capitals. Centre number Candidate number Surname Forename(s) Candidate signature H GCSE BIOLOGY Higher Tier Paper 2H Monday 11 June 2018 Morning Time allowed: 1 hour 45 minutes A Materials For Examiner’s Use For this paper you must have: Question Mark • a ruler 1 • a scientific calculator. 2 Instructions 3 • Use black ink or black ball-point pen. 4 • Fill in the boxes at the top of this page. 5 • Answer all questions in the spaces provided. 6 • Do all rough work in this book. Cross through any work you do not want to be marked. 7 • In all calculations, show clearly how you work out your answer. 8 Information 9 • There are 100 marks available on this paper. TOTAL • 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. * JUN1884612h01 * 8461/2H IB/G/Jun18/E7

PMT PMT Check Point Threat Extraction secured this document Get Original Please write clearly in block capitals. Centre number Candidate number Surname Forename(s) Candidate signature H GCSE BIOLOGY Higher Tier Paper 2H Monday 11 June 2018 Morning Time allowed: 1 hour 45 minutes A Materials For Examiner’s Use For this paper you must have: Question Mark • a ruler 1 • a scientific calculator. 2 Instructions 3 • Use black ink or black ball-point pen. 4 • Fill in the boxes at the top of this page. 5 • Answer all questions in the spaces provided. • Do all rough work in this book. Cross through any work you do not want to 6 be marked. 7 • In all calculations, show clearly how you work out your answer. 8 Information 9 • There are 100 marks available on this paper. TOTAL • 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. * JUN1884612h01 * 8461/2H IB/G/Jun18/E7

PMT PMT 2 Do not write outside the 0 1 Many human actions are reflexes. box 0 1 . 1 Which two of the following are examples of reflex actions? [2 marks] Tick two boxes. Jumping in the air to catch a ball Raising a hand to protect the eyes in bright light Releasing saliva when food enters the mouth Running away from danger Withdrawing the hand from a sharp object Figure 1 shows how the size of the pupil of the human eye can change by reflex action. Figure 1 0 1 Name one stimulus that would cause the pupil to change in size from A . 2 to B , as shown in Figure 1 . [1 mark] * 02 * IB/G/Jun18/8461/2H

PMT PMT 2 Do not write outside the 0 1 Many human actions are reflexes. box 0 1 . 1 Which two of the following are examples of reflex actions? [2 marks] Tick two boxes. Jumping in the air to catch a ball Raising a hand to protect the eyes in bright light Releasing saliva when food enters the mouth Running away from danger Withdrawing the hand from a sharp object Figure 1 shows how the size of the pupil of the human eye can change by reflex action. Figure 1 0 1 . 2 Name one stimulus that would cause the pupil to change in size from A to B , as shown in Figure 1 . [1 mark] * 02 * IB/G/Jun18/8461/2H

PMT PMT 3 Do not write outside the 0 1 . 3 Structure Q causes the change in size of the pupil. box Name structure Q . [1 mark] 0 1 . 4 Describe how structure Q causes the change in the size of the pupil from A to B . [1 mark] Question 1 continues on the next page Turn over ► * 03 * IB/G/Jun18/8461/2H

PMT PMT 3 Do not write 0 1 . 3 Structure Q causes the change in size of the pupil. outside the box Name structure Q . [1 mark] 0 1 . 4 Describe how structure Q causes the change in the size of the pupil from A to B . [1 mark] Question 1 continues on the next page Turn over ► * 03 * IB/G/Jun18/8461/2H