Waec Model Questions Vol1 2020 Biology Question 4

A closed‑system respirometer was used to study the effect of temperature on the rate of respiration in germinating mung‑bean seeds. Two identical chambers each contained five healthy seeds. Chamber A (control) was kept at 25 °C, while Chamber B (experimental) was maintained at 35 °C. The volume of CO₂ produced was recorded every 10 minutes for 60 minutes. The data obtained are shown below. | Time (min) | CO₂ volume in Chamber A (mL) | CO₂ volume in Chamber B (mL) | |------------|------------------------------|------------------------------| | 0 | 0.0 | 0.0 | | 10 | 2.1 | 3.4 | | 20 | 4.3 | 6.9 | | 30 | 6.5 | 10.3 | | 40 | 8.6 | 13.8 | | 50 |10.8 | 17.2 | | 60 |13.0 | 20.7 | The fresh weight of the five seeds in each chamber was 2.5 g. Answer the following questions: