(a(i))[3]
Calculate the percentage change in the number of erythromycin-resistant bacterial infections per 1000 people from 1993 to 1995. State your answer to two significant figures.
(a(ii))[3]
Describe the pattern in the data shown in Fig. 3.1.
(a(iii))[2]
Suggest reasons for the change shown in Fig. 3.1 in the number of bacterial infections resistant to erythromycin from 1993 to 1995.
(a(iv))[5]
Explain how bacteria acquire resistance to antibiotics.
(b(i))[2]
State two characteristics shared by all prokaryotes.
(b(ii))[1]
State the role of a flagellum.