0610_w05_qp_2
A paper of Biology, 0610
Questions:
8
Year:
2005
Paper:
2
Variant:
0
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2
Use Name two types of stimuli detected by the skin. 1. 2. shows a diagram of an eye in section. When a bright light is shone in the eye a pupil reflex occurs. On , using label lines label with an X where the stimulus for this reflex is detected, label with a Z the effector for this reflex. Examiner's Use shows a reflex arc. stimulus receptor neurone neurone neurone effector response Complete by naming the neurones that link the receptor with the effector. The ciliary body, cornea, lens and suspensory ligaments are involved in the focussing of the eye. Describe how each of these structures helps bring about the focussing of the image of this page by your eye.
14. Coordination and response  →  14.2. Sense organs
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3
Use Define the terms excretion, egestion. The kidney is an excretory organ. It produces urine that contains urea. State where in the body urea is formed. State what urea is formed from. shows the urinary system and its blood supply. Q R S T Name the parts labelled Q, R, S and T. Q R S T Examiner's Use Complete Table 3.1 to show which components of the blood are also part of the urine of a healthy person. Use ticks () and crosses (). Two boxes have already been completed. Table 3.1 component of blood present in urine glucose red blood cells salts urea  water white blood cells 
13. Excretion in humans  →  13.1. Excretion in humans
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4
Use shows the apparatus used in an investigation. black box to exclude light hydrogencarbonate indicator (pink/red at start) pond weed sunlight sunlight fresh water shrimp A C B D Complete Table 4.1 to show whether photosynthesis and respiration are happening in each tube. Table 4.1 tube contents and conditions photosynthesis happening respiration happening A pond weed in dark B pond weed in bright light C fresh water shrimp in dark D fresh water shrimp in bright light Examiner's Use Hydrogencarbonate indicator changes colour according to the pH of the contents of each tube, as shown in the pH chart in . pH pink/red colour of hydrogencarbonate indicator golden yellow purple The apparatus, shown in , was left for several hours. Complete Table 4.2 by predicting the colour of the indicator in each of the four tubes. Table 4.2 tube contents and conditions colour of hydrogencarbonate indicator after several hours A pond weed in dark B pond weed in bright light C fresh water shrimp in dark D fresh water shrimp in bright light Explain your predictions, stated in Table 4.2, for the colours of the hydrogencarbonate indicator in each of the tubes.
6. Plant nutrition  →  6.1. Photosynthesis
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5
Use Which form of the Sun’s energy is used by plants? Name the process that uses this absorbed energy. The graph, , shows how the concentration of carbon dioxide in the atmosphere has changed over a period of about 20 years. 6 7 9 10 time / year carbon dioxide concentration / parts per million 11 12 13 14 15 16 17 18 19 20 Describe the changes shown by this graph. The atmosphere around the earth acts as a trap for energy from the Sun. Carbon dioxide in the air traps heat energy. Suggest the effect the overall change in the graph, , may be having on the Earth’s climate. Explain your answer. Effect Explanation Examiner's Use Humans cause changes in ecosystems, including changing the amount of carbon dioxide in the atmosphere. Suggest two ways in which the overall change can be reversed.
6. Plant nutrition  →  6.1. Photosynthesis
20. Human influences on ecosystems  →  20.3. Pollution
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6
Use shows a bee that collects food materials from some flowers belonging to the same species. While it does this the bee also assists in the reproductive processes of the flowers. flower A flower B mature anther mature stigma nectary nectary Examiner's Use Name the stage in the reproduction of the plants in which the bee is involved. Suggest how this process might take place between flowers A and B. The ovules in each flower can develop into seeds. Which reproductive process must happen inside an ovule before it can become a seed? State which part of the flower develops into a fruit. Explain why plants grown from the seeds produced by these flowers will be similar to each other but may not be identical.
16. Reproduction  →  16.3. Sexual reproduction in plants
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7
Use shows the heart rate and the cardiac output. The cardiac output is the volume of blood pumped out of the heart each minute. heart rate / beats per minute cardiac output / dm3 per minute What is the cardiac output at a heart rate of 100 beats per minute? Determine the increase in cardiac output when the heart rate increases from 70 to 90 beats per minute dm3 per minute Determine the increase in cardiac output when the heart rate increases from 100 to 120 beats per minute. dm3 per minute Examiner's Use Which chamber of the heart pumps blood into the aorta? The upper and lower chambers on each side of the heart are separated by valves. State the function of these valves.
9. Transport in animals  →  9.2. Heart
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8
Use Plants need a supply of both magnesium ions and nitrate ions. Describe how root hair cells are adapted to increase the absorption of these ions. Name the tissue in which these ions are carried to the leaves. State what each of these ions is used for in a plant leaf cell. magnesium ions nitrate ions Most fertilisers contain materials that become nitrate ions in the soil. State why such fertilisers are often added to fields of crops. Describe the possible environmental effects of adding too much fertiliser to the soil.
6. Plant nutrition  →  6.1. Photosynthesis
19. Organisms and their environment  →  19.3. Nutrient cycles
3. Movement into and out of cells  →  3.2. Osmosis
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9
Use shows a side view of the female reproductive system. pubic bone On , label each of the following with the appropriate letter and a label line. The site where sperm are deposited. D The site where fertilisation normally occurs. F The site where oestrogen is produced. O A site where the placenta would normally develop during pregnancy. P A site where a surgical method of birth control could be used. S QUESTION 9 CONTINUES ON PAGE 18 Examiner's Use The placenta has many roles during pregnancy. For example maternal and fetal blood are prevented from mixing but digested nutrients pass across the placenta to the fetus. State two reasons why maternal and fetal blood should not mix. List three other roles of the placenta.
16. Reproduction  →  16.4. Sexual reproduction in humans
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