EXAMINATIONS COUNCIL OF SWAZILAND in collaboration with UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS Swaziland General Certificate of Secondary Education *8189754120* BIOLOGY 6884/01 Paper 1 Short Answers October/November 2010 1 hour Candidates answer on the Question Paper. No Additional Materials are required. READ THESE INSTRUCTIONS FIRST Write your Centre number, candidate number and name on all the work you hand in. Write in dark blue or black pen. You may use a soft pencil for any diagrams, graphs or rough working. Do not use staples, paper clips, highlighters, glue or correction fluid. Answer all questions. Write your answers in the spaces provided on the question paper. You may use a calculator. At the end of the examination, fasten all your work securely together. The number of marks is given in brackets [ ] at the end of each question or part question. This document consists of 7 printed pages and 1 blank page. DC (SM/SW) 19696/4 [Turn over
1 Fig. 1.1 shows five different animals. 2 A B C D Fig. 1.1 E State the class to which each of the animals belongs. A... B... C... D... E...[5] 6884/01/O/N/10
2 Fig. 2.1 shows a palisade cell. 3 F G H I Fig. 2.1 Name the parts labelled F, G, H and I. F... G... H... I...[2] 3 Circle the nutrient that is required for the proper growth of the thyroid gland. calcium iron iodine phosphorus [1] 4 Name one good source of each of the following nutrients. (i) carbohydrates... (ii) proteins... (iii) vitamin D...[3] 5 Name three substances that must be present in a balanced diet other than carbohydrates, proteins and vitamins. 1.... 2.... 3....[3] 6 Name a substance that could be lost from blood as it passes through the (i) kidneys,... (ii) lungs....[2] 6884/01/O/N/10 [Turn over
7 the following terms to complete statements A, B, C and D below. 4 technology pollutants eutrophication deforestation herbicides pesticides A The overuse of fertilizers can result in them being washed into the rivers resulting in an overgrowth of algae. This is called.... B... are chemicals which can be used to destroy weeds and can also be washed into rivers. C Sewage, chemical waste and poisonous gases are all harmful to the environment. A term used to describe these is.... D Uncontrolled cutting of vegetation can result in.... [4] 8 Fig. 8.1 shows a structure that plays a part in a reflex action. State the name of the structure. Fig. 8.1 9 In inheritance the genes are represented by letters. State the name given to the genotype represented by Tt. 10 A 20 year old man is found to be sexually under-developed. Doctors say he produces very little of an essential hormone. Name this essential hormone. 6884/01/O/N/10
11 Some animals are conserved by controlling their population. 5 (a) State one reason why conservation of species is important.... (b) Name an example of an animal whose population is controlled by cultural hunting expeditions in Swaziland. 12 Name the two parts that make up the central nervous system. 1.... 2....[2] 13 During vigorous exercise the body generates heat that may raise body temperature. Name two changes that will occur in the skin and surface blood vessels to return the body temperature to its original level. 1.... 2....[2] 14 State one difference in composition between inspired and expired air. 15 Genetic engineering is often used to produce better products for commercial purposes. State one example where genetic engineering is used in this way. 16 An increasing number of people are choosing to use drugs that are illegal. (a) Name two illegal drugs that cause social problems when misused. 1.... 2....[2] (b) State one social problem associated with alcohol abuse. 6884/01/O/N/10 [Turn over
17 Fig. 17.1a shows the front view of an eye and Fig. 17.1b shows the same eye a few minutes later. 6 Fig. 17.1a Fig. 17.1b What change in the environment brought about the change in the appearance of the eye from Fig. 17.1a to Fig.17.1b? 18 Fig. 18.1 shows pyramids constructed from the following food chain. marula tree cutworms birds snake pyramid L Fig. 18.1 pyramid M (a) Name the main source of energy for this food chain. (b) A grassland next to trees is a suitable place for snakes to live. State the ecological term for such a place. (c) Identify and name an organism from the food chain which occupies trophic level two. (d) Which of the pyramids shows a biomass pyramid? 6884/01/O/N/10
7 (e) State what would be most likely to happen to the number of snakes if all the birds were killed. 6884/01/O/N/10
8 BLANK PAGE Permission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Every reasonable effort has been made by the publisher (ECOS) to trace copyright holders, but if any items requiring clearance have unwittingly been included, the publisher will be pleased to make amends at the earliest possible opportunity. 6884/01/O/N/10