0610_s10_qp_21
A paper of Biology, 0610
Questions:
9
Year:
2010
Paper:
2
Variant:
1
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1
For Examiner's Use shows two cells. cell A cell B State where, in a human, a cell of type A would normally be found. State where, in a plant, a cell of type B would be found. Use only words from the list to complete the statements about cell B. air cellulose chloroplasts membrane mitochondria nucleus starch vacuole wall cell sap Cell B has a thick outer layer called the cell . This is made of . The cytoplasm of cell B contains many that are used in the process of photosynthesis. The large permanent is full of and this helps to maintain the shape of the cell. For Examiner's Use shows structures that produce urine and excrete it from the body of a mammal. On , label and name one organ. Use examples from to explain the difference between the terms organ and organ system. [Total 11]
2. Organisation of the organism  →  2.1. Cell structure
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3
Rain forests are the natural vegetation in areas with high rainfall. Tropical rain forest is being cut down in many parts of the world to clear land for agriculture. The soil of the rain forest allows water to drain through it very rapidly. Table 3.1 shows the yield of cotton crops, grown under three different conditions, on land cleared of rain forest. Table 3.1 yield of cotton / kg per hectare years since the forest was cleared no fertiliser added to the soil fertiliser added to soil during year 1 chopped grass added to the soil during year 1 What happened to the yield of cotton over the three years if no fertiliser was added to the soil? For Examiner's Use Suggest possible reasons for this change in the yield of cotton. What happened to the yield of cotton when fertiliser was added to the soil in year 1? Suggest why excessive quantities of fertiliser should not be added to the soil. Chopped grass added to the soil has little effect on the crop yield in year 1. Suggest why it has much greater effect on the yield in years 2 and 3.
20. Human influences on ecosystems  →  20.1. Food supply
3. Movement into and out of cells  →  3.2. Osmosis
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4
For Examiner's Use shows a pyramid of biomass. trophic level On , name trophic levels 1 and 3. shows a food web of a freshwater pond and shows the same pyramid of biomass as was shown in . microscopic green algae (J) water fleas (G) protozoas (H) larger plants (K) pond snails (hydras (D) mosquito larvae (E) leeches (F) sticklebacks (C) water boatmen (A) dragonfly larvae (B) trophic level In the boxes for trophic levels 2 and 4 in , write the letters (A to K) of all the organisms that are members of these trophic levels. For Examiner's Use An outbreak of a bacterial disease that affects only mosquito larvae occurred in the pond. Predict and explain two of the effects this might have on the hydra population.
19. Organisms and their environment  →  19.2. Food chains and food webs
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5
For Examiner's Use shows an experiment to investigate the conditions needed for germination. Tubes A, B, C and D are at room temperature and tube E is in a freezer. A B C D E seeds dry cotton wool moist cotton wool moist cotton wool boiled water black card oil room temperature in freezer State three of the environmental conditions this experiment is investigating. 1. 2. 3. Predict in which two tubes the seeds will germinate. Nuclear and cell division happen during germination. Name the type of nuclear division that takes place during the growth of a seedling. State how the number of chromosomes in each of the new cells compares with the number of chromosomes in the original cells. For Examiner's Use shows the changes in the dry mass of a broad been seed in the first five days after planting. time after planting / days dry mass / g 1 2 3 4 5 Describe and suggest an explanation for the changes that happen to the dry mass of the seed in the first five days after planting.
16. Reproduction  →  16.3. Sexual reproduction in plants
3. Movement into and out of cells  →  3.2. Osmosis
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6
For Examiner's Use shows a fetus developing inside the uterus. M O N P The fetus developed from a fertilised egg cell. Place an X on the diagram where an egg cell is normally fertilised. Name the structures M and N. M N Describe the role of structure M in gaseous exchange. Describe how the structures labelled O and P are involved in the birth of the baby. structure O structure P For Examiner's Use If a woman infected with HIV becomes pregnant, her baby may also be infected with HIV, by the time it is born. Suggest two ways this may happen. Apart from avoiding infections, describe two other ways that a pregnant mother can help her baby develop healthily. 1. 2.
16. Reproduction  →  16.4. Sexual reproduction in humans
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8
shows the route taken by blood around the body. lungs body organs heart chamber A heart chamber B C D E F Name the heart chambers A and B. A B Use information shown in to identify the type of blood vessel C as either an artery or a vein. type of vessel reason For Examiner's Use State and explain two differences between the contents of the blood flowing in vessels C and E. 1. 2. Suggest and explain which of the four blood vessels contains blood at the highest pressure.
9. Transport in animals  →  9.3. Blood vessels
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