AQA_H_Biology_Set_B_P1.

AQA_H_Biology_Set_B_P1. Name: ©HarperCollinsPublishers 2018 11 GCSE Biology H For this paper you must have: • a ruler • a calculator. Materials Advice • In all calculations, show clearly how you work out your answer. Information • There are 100 marks available on this paper. • 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. • When answering questions 07.3 and 09.3 you need to make sure that your answer: – is clear, logical, sensibly structured – fully meets the requirements of the question – shows that each separate point or step supports the overall answer. Instructions • Answer all questions in the spaces provided. • Do all rough work in this book. Cross through any work you do not want to be marked. Time allowed: 1 hour 45 minutesSET B – Paper 1 Higher Tier Author: Kath Skillern AQA 2 ©HarperCollinsPublishers 2018 01 Herbivores, pests and pathogens often destroy leaves and other parts of the plant. Plant defences minimise this damage. 01.1 Which of the following is a chemical plant defence response? Tick one box. Bark Cellulose cell walls Poison Waxy cuticle [1 mark] 01.2 Describe the action of two mechanical plant defence responses. Explain how each of them works. [4 marks] 01.3 Name two non-specific physical or chemical barriers that defend the body from infection. [2 marks] 01.4 Describe two ways white blood cells help defend the human body against pathogens. [2 marks] ©HarperCollinsPublishers 2018 3 02 Pathogens cause diseases in plants and animals. Plants and animals are able to defend themselves against attack. 02.1 Name a plant disease that is caused by a virus. [1 mark] 02.2 Explain how this virus affects the whole plant. [3 marks] 02.3 Name a plant disease that is caused by a fungus. [1 mark] 02.4 Plants can also be damaged by ion deficiency. Name an ion deficiency condition in plants. Describe one effect of this deficiency. Explain why this effect occurs.