CSEC Biology · January 2008 · Paper 2 · Question 5(a)(iii)

Figure 5 shows an incompletely labelled nitrogen cycle.

Leguminous plants have bacteria in their root nodules, which are involved in the nitrogen cycle. The relationship between the legumes and the bacteria is described as mutualistic. Explain why this description is appropriate.

This question uses a figure or table from the paper — you'll see it when you practise.