Neco Model Questions Vol1 2020 Biology Question 4

A group of students are investigating the effect of temperature on the rate of respiration in germinating beans using a closed‑system water‑displacement respirometer. The set‑up consists of a sealed container holding 10 germinating beans connected to an inverted graduated tube filled with water. The volume of gas displaced is recorded at 5‑minute intervals for three different water‑bath temperatures (20 °C, 30 °C and 40 °C). The data obtained are shown below. | Temperature (°C) | Time (min) | Volume of gas collected (mL) | |------------------|------------|------------------------------| | 20 | 5 | 12 | | 20 | 10 | 24 | | 30 | 5 | 18 | | 30 | 10 | 36 | | 40 | 5 | 30 | | 40 | 10 | 60 | Answer the following questions: