State the term used for an organism that causes disease.
State the term used for a disease type in which the disease-causing organism is transferred from one host to another.
Complete Table 1.1 by naming some structures found in a bacterial cell and giving the function of each one.
Fig. 1.1 shows a photograph of the bacterium that causes cholera. The length of the bacterium in the photograph is 100 mm. Use this value to calculate the actual length of the bacterium in micrometres ($\mu$m).
Use what you know about a specialised human cell to suggest the name of structure Z and give its function.
The binomial name of this bacterium is $\textit{Vibrio cholerae}$. State the genus of this bacterium and one advantage of the binomial system used to name species.
Explain how the presence of these bacteria in a human leads to diarrhoea, one of the symptoms of cholera.