CAPE Biology Unit 2 · 2011 · Paper 1 · Question Q7
Items 7 - 8 refer to the apparatus below which is set up to determine the rate of respiration of germinating seeds. Which of the following statements explain why the apparatus is left in the water for five minutes before readings are taken? I. To allow water to fill the capillary tube. II. To stabilise the pressure of the apparatus. III. To stabilise the temperature of the apparatus. IV. The seeds needed to adjust to experimental temperature.
- (A)I and II only
- (B)II and III only
- (C)II, III and IV only
- (D)I, II, III and IV
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