GCSE Biology March 2007 Human Biology Answer Key

abc General Certificate of Secondary Education Science A 4461 Biology 4411 BLY1A F & H Objective Test Answer Keys March 2007 examination series Version : 1.0Answer keys are prepared by the Principal Examiner and considered, together with the relevant questions, by a panel of subject teachers. Further copies of these answer keys are available to download from the AQA Website: www.aqa.org.uk Copyright © 2007 AQA and its licensors. All rights reserved. COPYRIGHT AQA retains the copyright on all its publications. However, registered centres for AQA are permitted to copy material from this booklet for their own internal use, with the following important exception: AQA cannot give permission to centres to photocopy any material that is acknowledged to a third party even for internal use within the centre. Set and published by the Assessment and Qualifications Alliance. The Assessment and Qualifications Alliance (AQA) is a company limited by guarantee registered in England and Wales (company number 3644723) and a registered charity (registered charity number 1073334). Registered address: AQA, Devas Street, Manchester M15 6EX Dr Michael Cresswell Director GeneralScience A/Biology – BLY1A (Human Biology) -AQA GCSE Answer Keys March 2007 series 3 BLY1A (Human Biology) Foundation Tier Question Key One A ear 4 B eye 2 C nose 3 D skin 1 Two A arthritis 2 B diabetes 1 C heart disease 3 D high blood pressure 4 Three A flash of light 4 B palm of hand touched 3 C cheek stroked 2 D mouth touched by mother’s finger 1 Four A total water loss from the body 1 B water loss from the kidneys 2 C water loss from the lungs 4 D water loss from the skin 3 Five A can be used to treat the symptoms of some diseases 2 B can lead to addiction to hard drugs 3 C contains carbon monoxide 4 D often leads to lack of self-control 1 Six A antibiotics 1 B natural selection 3 C pandemic 4 D resistance 2 A B C D Seven 3 1 3 4 Eight 4 1 2 4 Nine 2 4 1 2 Science A/Biology – BLY1A (Human Biology) -AQA GCSE Answer Keys March 2007 series 4 BLY1A (Human Biology) Higher Tier Question Key One A antibiotics 1 B natural selection 3 C pandemic 4 D resistance 2 Two A may cause damage to the liver and brain 2 B may cause less oxygen to be carried by the blood 1 C may cause withdrawal symptoms 3 D may lead to becoming addicted to a hard drug 4 A B C D Three 4 1 2 4 Four 2 4 1 2 Five 4 3 3 1 Six 2 3 3 3 Seven 3 3 4 2 Eight 2 4 2 1 Nine 2 2 2 2