Table 2 shows the mean metabolic rate of a breed of domestic rabbit (Oryctolagus cuniculus) at different ages.
| Age in weeks | Mean metabolic rate in kJ kg−1 hour−1\text{kJ}\ \text{kg}^{-1}\ \text{hour}^{-1}kJ kg−1 hour−1: Males | Mean metabolic rate in kJ kg−1 hour−1\text{kJ}\ \text{kg}^{-1}\ \text{hour}^{-1}kJ kg−1 hour−1: Females |
|---|---|---|
| 8 | 18.2 | 16.5 |
| 16 | 14.8 | 13.2 |
| 24 | 12.5 | 11.4 |
| 32 | 11.1 | 10.1 |
| 40 | 10.2 | 9.3 |
Calculate the percentage decrease in the mean metabolic rate of females between 8 weeks and 40 weeks of age.
Use the equation:
percentage decrease=decrease in metabolic rateoriginal metabolic rate×100 \text{percentage decrease} = \frac{\text{decrease in metabolic rate}}{\text{original metabolic rate}} \times 100 percentage decrease=original metabolic ratedecrease in metabolic rate×100Give your answer to 3 significant figures.
51 exam-style questions on AQA GCSE Biology 4.2 Respiration, covering 4.2.1 Aerobic and anaerobic respiration, 4.2.2 Response to exercise, and 4.2.3 Metabolism. Each one has a worked solution and a mark scheme showing where the marks go.