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Photosynthesis

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Question 6

An investigator researched the combined effects of light intensity and temperature on the rate of photosynthesis in the freshwater macrophyte Elodea canadensis. The rate of photosynthesis was determined by measuring the volume of oxygen gas produced and collected in a micro-gas syringe over a continuous 6-minute interval.

The data obtained by the investigator are presented in the table below:

Light intensity (arbitrary units)Temperature (∘C^\circ\text{C}∘C)Volume of oxygen produced (mm3\text{mm}^3mm3)
2012.08
6012.022
12012.031
24012.034
2028.018
6028.054
12028.019
24028.088
2055.01
6055.02
12055.02
24055.03
a.

Identify the anomalous result in the table and describe how the investigator could confirm whether this result is indeed anomalous.

[2]
b.

Suggest why the rate of photosynthesis is extremely low across all light intensities when the temperature is maintained at 55.0∘C55.0^\circ\text{C}55.0∘C.

[3]

Photosynthesis Questions

  1. A Level
  2. /Biology
  3. /Photosynthesis