0610_s16_qp_41
A paper of Biology, 0610
Questions:
6
Year:
2016
Paper:
4
Variant:
1
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1
shows the human heart and the main blood vessels. The functions of the parts of the heart and some of the blood vessels are given in Table 1.1. A B C D E F G H J K 1 15 A group of students used a heart monitor to record the pulse rate of an athlete during a 5000 metre race. The recordings started just before the race began and ended just after it had finished, as shown in . time / min pulse rate / beats per minute start of race end of race Use data from to describe the effect of exercise on the pulse rate of the athlete. 1 15 Explain the change in pulse rate between 2 minutes and 3 minutes after the recordings started. [Turn over 1 15
9. Transport in animals  →  9.2. Heart
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The nervous system coordinates the responses of animals to changes in their environment. shows the arrangement of the nervous system in a mammal. Complete by writing the names of the missing parts of the mammalian nervous system in the boxes. nervous system brain nervous system nervous system cranial nerves spinal nerves is a flow chart that shows how an involuntary action is controlled. painful stimulus pain receptor X relay neurone motor neurone muscle response 1 15 State the structure found at X. State the type of involuntary action shown by the flow chart. State two ways in which a voluntary action differs from an involuntary action. [Turn over 1 15 shows three pots of seedlings that have been kept in different conditions. pot P pot Q pot R State the conditions in which pots P and Q were kept. P Q State the name of the growth response shown by the seedlings in pot R. 1 15 Explain the advantage to the seedlings of this growth response. Auxins control the growth responses of seedlings. Explain how auxins control the growth response of the seedlings in pot R. [Turn over 1 15
14. Coordination and response  →  14.1. Coordination and response
14. Coordination and response  →  14.3. Hormones
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Catalase is an enzyme that breaks down hydrogen peroxide inside cells. Red blood cells contain catalase. Some dogs have an inherited condition in which catalase is not produced. This condition is known as acatalasia and it is caused by a mutation in the gene for catalase. Define the terms gene and gene mutation. gene gene mutation A geneticist was asked to investigate the inheritance of acatalasia in dogs. The normal allele is represented by B and the mutant allele is represented by b. The geneticist made the diagram in to show the inheritance of acatalasia in a family of dogs. The shaded symbols indicate the dogs with acatalasia. normal male normal female male with acatalasia
17. Inheritance  →  17.4. Monohybrid inheritance
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female with acatalasia State the genotypes of the dogs identified as 1, 2 and 3 in . 1 15 The geneticist crossed dog 4 with dog 5. Approximately half of the offspring had acatalasia and half the offspring did not have acatalasia. Complete the genetic diagram to show how this is possible. parental phenotypes parental genotypes gametes Punnett square normal , dog 4 has acatalasia dog 5 + offspring genotypes offspring phenotypes State the name given to the type of cross that you have completed in . [Turn over 1 15 Rhabdostyla is a single-celled organism that has no cell wall and no chlorophyll. Gases are exchanged across the cell membrane of Rhabdostyla. Name: the gas produced by Rhabdostyla the process that produces the gas the method of removal of the gas Rhabdostyla lives in freshwater habitats, such as ponds, lakes and rivers. Freshwater has a very low concentration of solutes. Rhabdostyla has a contractile vacuole that fills with water and empties at intervals as shown in . The contractile vacuole removes excess water. contractile vacuole contractile vacuole expels excess water not drawn to scale Explain, using the term water potential, why Rhabdostyla needs to remove excess water. 1 15 In an investigation, individual Rhabdostyla were placed into different concentrations of sea water. The rate of water excreted by the contractile vacuole of each organism was determined. The results are shown in . rate of water excreted / µm3 s–1 concentration of sea water / % Explain the results shown in . [Turn over 1 15 Single-celled organisms with cell walls do not have contractile vacuoles. Suggest why. 1 15
3. Movement into and out of cells  →  3.2. Osmosis
8. Transport in plants  →  8.3. Transpiration
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A researcher investigated the population growth of fish for fish farming. The researcher stocked a farmer’s lake with a small number of these fish and recorded the number of fish over the next five years. The researcher’s results showed that the population of fish had increased exponentially. Use the axes to show the exponential growth in the population of fish. Label the axes and draw a suitable curve. Explain why the population of fish increased exponentially. [Turn over 1 15 shows the total mass of wild fish caught worldwide between 1950 and 2012 and the mass of farmed fish produced worldwide over the same period. wild fish wild fish farmed fish farmed fish year mass of fish / millions of tonnes wild fish farmed fish Describe the changes in the mass of wild fish caught between 1950 and 2012. You will gain credit if you use data from . 1 15 It is predicted that wild fish stocks will decrease and become depleted because of overfishing. Suggest ways in which governments can try to maintain the stocks of wild fish. Like fish stocks, forests can be a sustainable resource. Discuss what is meant by the term sustainable resource, using forests as an example. [Turn over 1 15
19. Organisms and their environment  →  19.4. Populations
20. Human influences on ecosystems  →  20.4. Conservation
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State the balanced chemical equation for photosynthesis. light chlorophyll A student investigated the effect of different wavelengths of light on the rate of photosynthesis of the water plant, Cabomba. The student used the apparatus shown in . OFF bench lamp coloured filter graduated tube gas syringe tap 1% sodium hydrogencarbonate solution funnel Cabomba 0.0 0.5 1.0 1 15 The student collected the gas produced by the plant for five minutes. The results are shown in Table 6.1. Table 6.1 volume of gas collected/cm3 wavelength of light/nm colour of filter 0.80 violet 0.80 blue 0.20 green 0.40 yellow 0.90 red Describe the effect of wavelength of light on the rate of photosynthesis as shown in the student’s results in Table 6.1. You will gain credit if you use data from the table. State how the student would calculate the rates of photosynthesis from the results in Table 6.1. [Turn over 1 15 State why the student: kept the lamp at the same distance during the investigation, used sodium hydrogencarbonate solution. State three uses in a plant of the carbohydrate produced in photosynthesis.
6. Plant nutrition  →  6.1. Photosynthesis
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