0610_s07_qp_2
A paper of Biology, 0610
Questions:
10
Year:
2007
Paper:
2
Variant:
0
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1
For Examiner's Use Figs. 1.1 – 1.4 show organisms or parts of organisms (not drawn to scale). A B State which of the drawings shows a monocotyledon leaf. State one reason for your choice. D C 50 mm State which of the drawings shows an annelid. State one reason for your choice. For Examiner's Use E F State which of the drawings shows an arachnid. State one reason for your choice. G H State which of the drawings shows a crustacean. State one reason for your choice. For Examiner's Use The length of the drawing of worm C, in , is shown. The actual length of the worm is 5 mm. Calculate the magnification of this drawing. Show your working. magnification
2. Organisation of the organism  →  2.2. Size of specimens
1. Characteristics and classification of living organisms  →  1.3. Features of organisms
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2
For Examiner's Use shows a flower of a dicotyledon. nectary C A B Name parts A and B, shown on . A B State the function of part C. The flower shown in is insect pollinated. Describe how two features, visible in , would be different in a wind pollinated flower. For Examiner's Use Complete Table 2.1 by placing a tick () in the boxes to show which processes happen during the reproduction of flowering plants and which happen during the reproduction of humans. Table 2.1 process flowering plants humans fertilisation germination implantation pollination sexual intercourse While visiting a new region of forest a student found an unknown plant. Hanging from it were some structures with bright red outer coverings. These contained some soft fleshy tissue. In this tissue were many seeds with hard outer coats. Suggest, with reasons, how these seeds might be dispersed. method of dispersal reasons Suggest which conditions in the forest would allow these seeds to germinate and grow into young plants.
16. Reproduction  →  16.3. Sexual reproduction in plants
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3
For Examiner's Use shows the variation in the height of human adults in an African population. percentage of population height / cm State the type of variation shown by this data. For Examiner's Use In Britain 42% of the population have blood group A. The frequency of the other blood groups is: B (9%), AB (3%) and O (46%). Plot the data, as a bar chart, on . blood group frequency % Complete the following sentence. Height is controlled by environment and by genes but human blood groups are controlled only by . Sometimes human characteristics are altered by mutations. Define the term mutation. Suggest two factors that could increase the rate at which mutations occur.
18. Variation and selection  →  18.1. Variation
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4
For Examiner's Use The table shows the area of tropical forests in some parts of the world and the rate of their destruction during the period 1990 – 2000. region of the world area of forest in 2000 / km2 area destroyed each year 1990 – 2000 / km2 annual percentage rate of destruction A 697 000 13 000 1.8 B 1 389 000 18 000 1.3 C 2 154 000 15 000 0.7 D 117 000 2 000 1.7 E 434 000 12 000 2.8 F 8 399 000 84 000 1.0 State which region had the greatest area of forest destroyed each year. State which region had the highest annual percentage rate of destruction. Use the data to suggest what the area of tropical forest in Region F will be in 2100. Predict which region will have the smallest area of forest in the year 2010. Tropical forests produce a large mass of dead vegetation each year which is decomposed. Name one type of microorganism that decomposes this dead plant matter. Name two substances that are released during decomposition that benefit the plants in the forest. For Examiner's Use Tropical forest is often cleared to provide ground for crop growth. However, after about three years, this land has to be abandoned and a new area is cleared. Suggest why a new area is needed after about three years of crop growing.
20. Human influences on ecosystems  →  20.2. Habitat destruction
20. Human influences on ecosystems  →  20.1. Food supply
6. Plant nutrition  →  6.2. Leaf structure
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5
For Examiner's Use shows the carbon cycle. The arrows represent the various processes that happen in the cycle. carbon dioxide in air carbon compounds in plants carbon compounds in fossil fuels carbon compounds in dead animals and plants E B A C D G F box X death + excretion Complete the diagram by filling in box X. State the letters of two arrows that represent respiration. and State the letter of the arrow that can only represent combustion in this cycle. State the letter of the arrow that represents the process in the cycle that takes millions of years to happen. Photosynthesis is not shown on the diagram. Draw an arrow on to represent photosynthesis and label it P. Write a word equation for photosynthesis.
6. Plant nutrition  →  6.1. Photosynthesis
19. Organisms and their environment  →  19.3. Nutrient cycles
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6
For Examiner's Use shows a plant cell from a leaf. A B C F E D State the letters for the three parts of this cell that only occur in plant cells. letters , and . State two differences in structure between this leaf cell and a root hair cell. Explain the reason for each difference. difference reason difference reason For Examiner's Use Describe one difference that exists between a red blood cell and a typical animal cell. State an advantage of this feature in a red blood cell.
2. Organisation of the organism  →  2.1. Cell structure
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7
For Examiner's Use A student investigated the effect of changing pH on the rate of reaction of a digestive enzyme. Define the term enzyme. Table 7.1 shows the results of this investigation. Table 7.1 pH rate of reaction / arbitrary units Plot the results as a line graph on . rate of reaction / arbitrary units pH For Examiner's Use Suggest where in the human digestive system this enzyme would have been most active. The investigation at pH 3 was repeated but the enzyme was boiled before its use. Suggest how and why the results would have been different.
5. Enzymes  →  5.1. Enzymes
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10
For Examiner's Use 10 Water is lost from leaves by transpiration. Name the structures through which most water vapour is lost from a leaf. Name the tissue that water flows through in the stem to reach a leaf. is a graph showing the rate of water loss by a number of similar leafy shoots under different conditions. rate of water loss time 8 am A X B C Graph line X shows the rate of water loss by a shoot in slow moving air as the temperature increases from 8 am onwards. Suggest which line would show the rate of water loss of a shoot in fast moving air as the temperature increases from 8am onwards. line Explain your choice. explanation For Examiner's Use Suggest which line would show the rate of water loss of a shoot that was placed in an airtight plastic bag at 8 am. line Explain your choice. explanation
8. Transport in plants  →  8.3. Transpiration
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