BIOLOGY 6884/01 Paper 1 Short Answers October/November hour Candidates answer on the Question Paper. No Additional Materials are required.

Transcription

1 EXAMINATIONS COUNCIL OF SWAZILAND in collaboration with UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS Swaziland General Certificate of Secondary Education * * BIOLOGY 6884/01 Paper 1 Short Answers October/November 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. DO NOT WRITE IN ANY BARCODES. 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 8 printed pages. DC (NH/CGW) 35044/4 ECOS 2011 [Turn over

2 2 1 Match the tissue to the function that it performs by drawing a straight line from the tissue to its function. Tissue Function xylem sweeping of dust particles red blood cells conduction of water ciliated cells absorption of water transport of oxygen [3] 2 State the importance of the following nutrients in a diet. calcium... vitamin C... [2]

3 3 3 Fig. 3.1 shows decay in part of a human tooth. Fig. 3.1 (a) Name the type of tooth shown in Fig (b) Name the part of the tooth that is decayed in Fig (c) State two ways in which tooth decay could be prevented [2] (d) Label, on the diagram, the part which contains nerve endings. [1] [Turn over

4 4 4 Fig. 4.1 shows a section through the heart. B C D A (a) Name the parts labelled A and C. Fig. 4.1 A.... C.... [2] (b) Circle a letter in Fig. 4.1 that shows a blood vessel which carries deoxygenated blood. [1] 5 Complete the equation for anaerobic respiration in yeast. glucose + carbon dioxide + energy [1] (enzymes) 6 The paragraph below describes excretion in the kidney. Complete the description by filling in the blanks using the given terms: filtration osmosis re-absorption sweat urine Each term may be used once, more than once, or not at all. During excretion in the human kidneys some substances are removed from the blood in a process called. Glucose and some salts are taken back into the blood in the process called.. while others are eliminated from the bladder as. [3]

5 5 7 Fig. 7.1 shows a bean seedling in the soil shortly after germinating and several hours after. shoot root shortly after germinating several hours after Fig. 7.1 (a) Name the stimulus that the root is responding to by growing downwards. (b) State the type of response shown by the shoot growing upwards. 8 A person stands and looks at a moving car over an interval of 10 s. Fig. 8.1 shows his eye in longitudinal section over this period. lens 0 s 5 s 10 s Fig. 8.1 (a) State the direction of movement of the car in relation to the person. (b) State the term used to describe the ability of the eye to view near and far objects. [Turn over

6 6 9 Fig. 9.1 shows a stem that was left lying down in a garden and its appearance four weeks later. stem before stem after 4 weeks Fig. 9.1 (a) Name the method of reproduction that is shown in Fig (b) Name one example of a plant that reproduces in the same way as the stem in Fig Fig shows the female reproductive system. Fig (a) Label on Fig. 10.1, using the appropriate letter and label-line, the regions where the following occur. E F G production of oestrogen implantation of the foetus surgery is performed as a method of birth control. [3]

7 7 11 People who misuse drugs often inject the drugs into their bodies. Describe the dangers of sharing the needles used for this purpose....[2] 12 In the wild, only the very fast zebras survive and pass on their genes to their young ones. The slow zebras die before they reach maturity. (a) Name this type of selection. (b) Broiler chickens grow fast and require little food to mature. This was achieved through selection. State the purpose of such selection Fig shows a food chain. maize grasshopper chicken human being Fig (a) State the position occupied by the grasshopper in the food chain. (b) State the principal source of energy for the maize. (c) Explain why it would be more efficient for human beings to feed on maize instead of chicken [2] [Turn over

8 8 (e) Fig shows a pyramid for the food chain in Fig Fig Name the type of pyramid shown in Fig State one undesirable effect of each of sewage and sulfur dioxide pollution to the environment. (a) sewage... (b) sulfur dioxide Woodlice are invertebrate animals that live under the bark of trees. They move to shelter if the bark is removed. Name the type of response shown by the woodlice State the function of the following nutrients in plants. (a) magnesium ions... (b) nitrate ions... 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 (UCLES) 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.