CAPE Biology Unit 2 · 2011 · Paper 1 · Question Q8

Items 7 - 8 refer to the apparatus below which is set up to determine the rate of respiration of germinating seeds. Another set of apparatus is set up in exactly the same way but glass beads are used instead of germinating peas. The purpose of the apparatus with the beads is to

1. (A)serve as a control
2. (B)measure oxygen taken up
3. (C)measure carbon dioxide produced
4. (D)show that germinating seeds absorb carbon dioxide

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