CAPE Biology Unit 2 · 2014 · Paper 1 · Question Q13

Which of the following shows the types of bacteria that are involved in Steps 1, 2 and 3?

1. (A)1: Nitrogen-fixing Bacteria; 3: Denitrifying Bacteria; 2: Nitrifying Bacteria
2. (B)2: Nitrogen-fixing Bacteria; 1: Denitrifying Bacteria; 3: Nitrifying Bacteria
3. (C)3: Nitrogen-fixing Bacteria; 1: Denitrifying Bacteria; 2: Nitrifying Bacteria
4. (D)3: Nitrogen-fixing Bacteria; 2: Denitrifying Bacteria; 1: Nitrifying Bacteria

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