6.1.2 Explain the mechanism that is responsible for the movement of water in xylem vessels. (4)

5.3.2 Describe the effects on the body of the secretion of ion X into the lumen of the intestine. (4)

1.3.2 Many countries have laws that ban smoking in public buildings. Discuss the evidence from Table 1.1 that supports these laws. (3)

2.1.2 State the name of the process by which oxygen is transferred from fluid B to the cells. (1)

3. One of the characteristics of living organisms is sensitivity   3.1 Define the term sensitivity. (2)

  TOTAL QUESTION 4 [12]

  TOTAL QUESTION 5 [15]

4.1 Describe the similarities and differences between marasmus and kwashiorkor. (4)   similarities…………………………… differences………………………….  

4.2.3 The health workers provided advice to the community on ways of preventing the spread of the pathogens that cause diarrhoea. Suggest the advice that was given to the community. (3)

3.3 Scientists investigated the effect of adrenaline on blood glucose concentration in rats. The rats were put into two groups: • group A was given an injection of adrenaline • group B was given an injection that did not contain adrenaline The blood glucose concentrations of the rats in both groups were monitored for three hours after the injections. The rats did not eat for 12 hours before the investigation or while they were being monitored. The results are shown in Fig. 3.1.     Right-click on the blue button to open Fig 3.1