1 霹雳怡保培南独立中学 SM POI LAM (SUWA) IPOH FINAL EXAMMINATION 2023 BIOLOGY PAPER 4 _______________________________________ DATE: 30th JUNE 2023 TIME: 1425 - 1540 (1 HOUR 15 MINUTES) _______________________________________ NAME: ___________________________________ REG NO: ______________ CLASS: S1YI, S1AI, S1HE, S1PIN READ THESE INSTRUCTIONS FIRST 1. This paper consists of 6 structured questions. 2. Answer all the questions. 3. Write your answer on the spaces provided. 4. Write in BLUE or BLACK pen only. 5. Use pencil for any diagrams or graphs. 6. You may use a non-programmable scientific calculator. Total marks for this paper are 80%. This paper consists of 13 printed pages. Prepared by ： ………………………………............ (TAMILARASI NARAYANASAMY) Checked by： ….….……………….. (LOKE WAI CHUAN) Do Not Turn This Page Until You Are Told To Do So Date: 30-10-2023
2 1. (a) Fig. 1.1 shows diagrams of the circulatory systems of a fish and a mammal. The arrows show the direction of blood flow through the circulatory systems. Figure 1.1 (i) State the names of the structures labelled Q, T, W and X. Q .................................................................................................................................................. T .................................................................................................................................................. W ................................................................................................................................................. X .................................................................................................................................................. [4]
3 (ii) State the name of structure V on Fig. 1.1 and describe its function. ..................................................................................................................................................... ..................................................................................................................................................... ..................................................................................................................................................... ..................................................................................................................................................... ............................................................................................................................................... [2] (iii) Fig. 1.1 shows that fish and mammals have different types of circulation. State why the fish circulation is called a single circulation. ..................................................................................................................................................... ..................................................................................................................................................... ............................................................................................................................................... [1] (iv) Explain the advantages of the double circulation of the mammal. ..................................................................................................................................................... ..................................................................................................................................................... ..................................................................................................................................................... ..................................................................................................................................................... ..................................................................................................................................................... ..................................................................................................................................................... ............................................................................................................................................... [3] (b) The blood vessels that supply the heart muscle can become blocked. (i) State the name of the blood vessels that supply the heart muscle. ............................................................................................................................................... [1] (ii) State one way in which blockages in these blood vessels can be treated. ............................................................................................................................................... [1]
4 (c) Substances move between blood and tissues at various sites in the circulatory system of mammals. (i) Oxygen is absorbed into the blood as it passes through the lungs. State the structures in the lungs where oxygen passes into the blood from the air. ............................................................................................................................................... [1] (ii) State the site of filtration of blood in the kidneys. ............................................................................................................................................... [1] (iii) State the name of the process in which products of digestion move into cells and are used to become part of the cells. ............................................................................................................................................... [1] (iv) State the name of the process in which excess amino acids are broken down in liver cells to produce ammonia. ............................................................................................................................................... [1] (v) State the name of the organ that releases oestrogen into the blood. ............................................................................................................................................... [1] [Total: 17]
5 2. (a) Define the term sensitivity. ...................................................................................................................................................... ...................................................................................................................................................... ................................................................................................................................................. [3] Fig. 2.1 shows the reflex arc involved in a simple reflex action. Figure 2.1 (b) On Fig. 2.1 use label lines and the following letters to show F a receptor in the skin G the neurone that transmits impulses to the spinal cord H the effector in this reflex arc. [3] (c) A reflex is an involuntary action. Explain what is meant by the term involuntary action. ...................................................................................................................................................... ...................................................................................................................................................... ................................................................................................................................................. [2]
6 (d) Suggest the advantages of having reflexes. You may refer to an example to illustrate your answer. ...................................................................................................................................................... ...................................................................................................................................................... ................................................................................................................................................. [3] (e) In dangerous situations there is an increase in the secretion of adrenaline from the adrenal glands. Describe three ways in which this increase in adrenaline prepares the body for action. 1 ................................................................................................................................................... 2 ................................................................................................................................................... 3 ...............................................................................................................................................[3] [Total: 13] 3. (a) Fig. 3.1 shows part of a classification diagram for plants. (i) Complete Fig. 3.1. Figure 3.1 [2] (ii) Describe two identifying features of monocotyledons. 1 ................................................................................................................................................... 2 ..............................................................................................................................................[2]
7 (b) Fig. 3.2 shows the parts of two flowers from two different plants of the same species. Figure 3.2 (i) Describe what is meant by the term species. ..................................................................................................................................................... ..................................................................................................................................................... ................................................................................................................................................ [2] (ii) Annotate Fig. 3.2 to show the mechanism of cross-pollination by: • labelling the structures involved • drawing an arrow to show the pathway of pollen. [3] (iii) Draw an X on Fig. 3.2 to show where fertilisation occurs. [1] (iv) Explain the disadvantages of cross-pollination compared with self-pollination. ..................................................................................................................................................... ..................................................................................................................................................... ..................................................................................................................................................... ..................................................................................................................................................... ..................................................................................................................................................... ..................................................................................................................................................... ................................................................................................................................................ [3] [Total: 13]
8 4. The eye is a sense organ that is part of the nervous system. (a) Explain why the eye can be described as a sense organ. ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ................................................................................................................................................. [2] (b) State the two parts of the central nervous system. 1 ................................................................................................................................................... 2 ...............................................................................................................................................[2] (c) Fig. 4.1 is a diagram of a section through the human eye. Figure 4.1 (i) Draw an X on Fig. 4.1 to identify the blind spot. [1]
9 (ii) Table 4.1 shows some of the parts labelled in Fig. 4.1, their names and their functions. Complete Table 4.1. Table 4.1 Name of the part Letter in Fig 4.1 Function H Transmits impulses to the central nervous system Cornea [3] (d) State the names of the two effectors that contract and relax during the pupil reflex. ................................................................... and .................................................................... [1] (e) Explain why a person is unable to focus on distant objects if the suspensory ligaments become permanently overstretched. ..................................................................................................................................................... ..................................................................................................................................................... ..................................................................................................................................................... ..................................................................................................................................................... ..................................................................................................................................................... ..................................................................................................................................................... ............................................................................................................................................... [3] [Total: 12]
10 5. Measles is an example of a transmissible disease that is caused by a virus. (a) Complete the definition of transmissible disease. A transmissible disease is a disease in which the .............................................. can be passed from one .............................................. to another. [2] (b) Fig. 5.1 is a pie chart showing the number of people infected with four different transmissible diseases in one country in 2018. Figure 5.1 (i) State the name of the disease with the smallest number of infections in Fig. 5.1. ............................................................................................................................................... [1] (ii) Use the information in Fig. 5.1 to calculate the total number of people infected with these four diseases. ...................................... people infected [1] (iii) State the type of organism that causes cholera. ............................................................................................................................................... [1]
11 (c) (i) The list shows some examples of ways that disease-causing organisms can be transmitted. air animals blood contaminated surfaces food Complete Table 5.1 to show which are examples of direct contact and which are examples of indirect contact. Each example can be used once, more than once or not at all. Table 5.1 Direct contact Indirect contact [5] (ii) Table 5.2 shows three ways the body can defend itself and some examples of the three methods. Place ticks (✓) in the boxes to show the correct type of defence mechanism for each example. Table 5.2 Example of defence mechanism Cells Chemicals Mechanical Antibody production Hairs in the nose Mucus Phagocytosis Skin Stomach acid [6] [Total: 16]
12 6. (a) Fig. 6.1 shows a section through a human molar tooth. Figure 6.1 (i) Use label lines and labels to identify these structures on Fig. 6.1: • cement • gum • nerves. [3] (ii) State the function of the canine teeth in humans. ..................................................................................................................................................... ................................................................................................................................................[1]
13 (b) Fig. 6.2 is a diagram showing the stages of dental decay. Figure 6.2 (i) Describe the causes of dental decay. Use the letters in Fig. 6.2 in your answer. ..................................................................................................................................................... ..................................................................................................................................................... ..................................................................................................................................................... ..................................................................................................................................................... ..................................................................................................................................................... ..................................................................................................................................................... ..................................................................................................................................................... ............................................................................................................................................... [4] (ii) Describe one way of preventing dental decay. ..................................................................................................................................................... ..................................................................................................................................................... ............................................................................................................................................... [1] [Total: 9] ---------------------------------------END OF QUESTION PAPER-------------------------------------