0610_s08_qp_2 - revisedeck

0610_s08_qp_2

A paper of Biology, 0610

Questions:

11

Year:

2008

Paper:

2

Variant:

0

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1

For Examiner's Use Respiration is one of the characteristics of living things. List four other characteristics of living things not including respiration. Describe the difference between respiration and breathing.

12. Respiration → 12.1. Respiration

1. Characteristics and classification of living organisms → 1.1. Characteristics of living organisms

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2

Choose words from the list to complete each of the spaces in the paragraph. Each word may be used once only and some words are not used at all. bright dry dull heavy large light sepals small stamens sticky style Flowers of plants that rely on the wind to bring about pollination tend to have petals that have a colour. Their pollen is normally and . In these flowers, the and the both tend to be long.

16. Reproduction → 16.3. Sexual reproduction in plants

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3

For Examiner's Use Table 3.1 lists some of the food materials that need to be digested, the enzymes that carry out the digestion and the end products. Complete Table 3.1. Table 3.1 food material digestive enzyme end products of digestion starch simple sugars amino acids fat lipase Amino acids and glucose are carried in the blood from the intestine to the liver. Describe the processes that occur in the liver when there is an excess of these materials arriving in the blood. amino acids glucose

13. Excretion in humans → 13.1. Excretion in humans

7. Human nutrition → 7.4. Chemical digestion

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4

For Examiner's Use Name the two raw materials needed by plants for photosynthesis. Name the gas produced by photosynthesis. shows a leaf, with white and green regions, that is attached to a plant. The plant had been kept in the dark for 48 hours and then a lightproof, black paper cover was placed over part of the leaf. B C A D white region green region attachment to plant position of lightproof black paper cover on both sides of leaf For Examiner's Use The plant is left under a light for 24 hours. After this time the leaf is removed from the plant and is tested for the presence of starch. Which chemical reagent is used to show the presence of starch? Record the colour you would see, if you had carried out this test, in each of the areas A, B, C, and D. area colour A B C D Explain the results for each of the following areas. area B area D

6. Plant nutrition → 6.1. Photosynthesis

4. Biological molecules → 4.1. Biological molecules

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5

For Examiner's Use shows a section through the heart. X M L J K On , label parts J, K, L and M, shade in the blood vessels that carry deoxygenated blood, draw a series of arrows to show the direction of blood flow through the heart from the lungs to the rest of the body. Describe the role of valve X.

9. Transport in animals → 9.2. Heart

9. Transport in animals → 9.3. Blood vessels

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6

For Examiner's Use shows the female reproductive system. R S On , label structures R and S. On , label, with a line and a letter F, where fertilisation occurs, label, with a line and a letter I, where implantation occurs. During puberty, the secondary sexual characteristics develop. Name the hormone that controls these developments in a female and state which organ produces it. hormone organ producing it State two secondary sexual characteristics that develop in females, in parts of the body other than in the reproductive organs shown in .

16. Reproduction → 16.4. Sexual reproduction in humans

16. Reproduction → 16.5. Sex hormones in humans

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7

For Examiner's Use shows a family tree for a condition known as nail-patella syndrome (NPS). key female without NPS female with NPS male without NPS male with NPS State whether NPS is controlled by a dominant or a recessive allele. Explain which evidence from the family tree confirms your answer to . For Examiner's Use Explain what the chances are for a third child of parents 6 and 7 having NPS. You may use a genetic diagram to help your explanation.

17. Inheritance → 17.4. Monohybrid inheritance

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8

For Examiner's Use shows changes in the population of bacteria that take place in a river when untreated sewage is added to it. distance downstream (arbitrary units) population of bacteria (arbitrary units) raw sewage discharged into river Describe the changes in the population of bacteria that take place in this river. Suggest an explanation for these changes in the population of bacteria.

20. Human influences on ecosystems → 20.3. Pollution

10. Diseases and immunity → 10.1. Diseases and immunity

19. Organisms and their environment → 19.4. Populations

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9

For Examiner's Use shows part of a food web for the South Atlantic Ocean. algae krill fish Adelie penguin squid Ross seal Crabeater seal Leopard seal Killer whale Name the top carnivore in this food web. Name a member of this food web that is both a secondary and a tertiary consumer. Use the information from the food web to complete the food chain of five organisms. algae → → → → In the future the extraction of mineral resources in the Antarctic might occur on a large scale. This could destroy the breeding grounds of the Ross seal. State and explain what effects this might have on the population of Leopard seal. For Examiner's Use State and explain what effects this might have on the population of fish.

19. Organisms and their environment → 19.2. Food chains and food webs

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10

For Examiner's Use 10 Define the term homeostasis. It has been suggested by some scientists that the iris reflex is an example of homeostasis. Describe this reflex and explain why it might be considered to be a homeostatic mechanism.

14. Coordination and response → 14.4. Homeostasis

14. Coordination and response → 14.2. Sense organs

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11

For Examiner's Use 11 shows the urinary system and its blood supply. X Y Z direction of blood flow On label structures X, Y and Z. Table 11.1 shows the relative quantities of several substances in the blood in the renal artery and renal vein. Table 11.1 substance relative quantities in blood in renal artery (arbitrary units) relative quantities in blood in renal vein (arbitrary units) glucose 10.0 9.7 oxygen 100.0 35.0 sodium salts 32.0 29.0 urea 3.0 1.5 water 180.0 178.0

13. Excretion in humans → 13.1. Excretion in humans

9. Transport in animals → 9.3. Blood vessels

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