Explain why plants absorb carbon dioxide during photosynthesis.
Explain how the readings from the apparatus can be used to calculate the rate of photosynthesis.
State one environmental factor that should have been kept unchanged in this investigation.
Describe how temperature affects the rate of photosynthesis when carbon dioxide concentration A was used. Support your answer with data from Fig. 2.2.
Calculate the percentage increase in the rate of photosynthesis at $30\,^{\circ}\text{C}$ when the carbon dioxide concentration was raised from A to B as shown in Fig. 2.2. Show your working and give your answer to the nearest whole number.
Explain the effect of increasing temperature on the rate of photosynthesis for carbon dioxide concentration B. Use the term limiting factor in your answer.
The student concluded that carbon dioxide concentration is the factor limiting the rate of photosynthesis between $30\,^{\circ}\text{C}$ and $35\,^{\circ}\text{C}$ from the results shown for A in Fig. 2.2. State the evidence for this conclusion.
Predict and explain what would happen to the rate of photosynthesis if the investigation is continued at temperatures above $45\,^{\circ}\text{C}$.