2018年11月IB生物SL真题下载-Paper2
1. Trends in tobacco smoking and mortality due to lung cancer were measured in male and female smokers aged 35 to 59 living in the United Kingdom from 1950 to 2000. The first graph represents the proportion of smokers in the population. The second graph represents the mortality rate (deaths per year per 100 000 people) from lung cancer.
(a) Calculate the change in the percentage of the male population that smoked from 1950 to 2000.
(b) Compare and contrast the trends in smoking behaviour between males and females between 1950 and 2000.
(c) Evaluate the evidence provided by the data in the graphs for smoking as a cause of lung cancer.
The incidence of lung cancer in 75-year-old males was studied comparing current smokers, former smokers and non-smokers.
(d) Describe the relationship between the incidence of lung cancer and stopping smoking.
(e) Explain evidence from the data in the table that could be used to persuade a smoker to give up smoking.
(f) Among 75-year-old lifelong non-smokers the percentage incidence of lung cancer was 0.01 %. Suggest one possible cause of lung cancer in non-smokers.
(g) State two respiratory diseases, other than lung cancer, caused by smoking.
2. (a) (i) Label the area where cellulose is found in the micrograph of a plant cell.
(ii) Cellulose is the most abundant organic polymer on Earth. Describe the structure of cellulose.
(b) Outline one reason for humans being unable to digest cellulose.
(c) Explain the advantages of having both lipid and carbohydrate as energy stores in the human body.
2018年11月IB生物SL真题余下省略！
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