This question is about photosynthesis - AQA - GCSE Biology - Question 1 - 2020 - Paper 1

Plants capture light energy from the sun using chlorophyll found in their leaves. This light energy is then converted into chemical energy in the form of glucose during the process of photosynthesis.

To calculate the mean for Test 3 at 25 °C, we add the results from Test 1 and Test 2, then divide by 2:

$X = \frac{32.6 + 34.1 + 32.9}{3} = \frac{99.6}{3} = 33.2\ cm^3/hour$

Thus, the mean value X is 33.2 cm³/hour.

The rate of photosynthesis decreases from 35 °C to 45 °C because enzymes involved in the process become denatured at higher temperatures, leading to reduced efficiency.

To complete Figure 1, label the y-axis as 'Rate of photosynthesis in cm³/hour'. Scale the y-axis to represent the range of photosynthesis rates. Plot the mean values from Table 1 for temperatures from 25 °C to 45 °C on the graph. Finally, draw a line of best fit through the plotted points to clearly demonstrate the trend.