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The graph shows the rate of photosynthesis in a field containing grass plants, during a 12 hour period - Edexcel - GCSE Biology - Question 3 - 2012 - Paper 1
Question 3
The graph shows the rate of photosynthesis in a field containing grass plants, during a 12 hour period. (i) Describe the trend shown by the graph from 6 am to 6 pm.... show full transcript
Worked Solution & Example Answer:The graph shows the rate of photosynthesis in a field containing grass plants, during a 12 hour period - Edexcel - GCSE Biology - Question 3 - 2012 - Paper 1
Step 1
Describe the trend shown by the graph from 6 am to 6 pm.
Answer
From 6 am to midday, the rate of photosynthesis increases steadily, reaching its peak output at midday. After midday, the rate begins to decrease gradually until it reaches a lower level by 6 pm. The highest rate of photosynthesis occurs at midday.
Step 2
Suggest two factors that may affect the rate of photosynthesis during this 12 hour period.
Answer
- Light levels - The intensity and duration of light during the day will impact the rate of photosynthesis.
- Temperature - The ambient temperature can influence the enzymatic reactions involved in photosynthesis.