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Data Interpretation & Analysis 6
Review the graph below and explain your findings.
(Modified from: https://www.proprofs.com/quiz-school/user_upload/ckeditor/31(1).png)
Average Candidate Response
This graph shows the growth of bacteria with respect to temperature. Analysing this, one can say that bacteria grow faster as the temperature increases.
Excellent Candidate Response
Excellent candidates will use the 'BlackStone Tutors Six Point Approach for Data Analysis'
- Data Title (if present)
- 'x' axis and 'y' axis
- Graphical/tabular progression shown
- Physiological correlation (How can this pattern be explained biologically?)
- Anomalies/additional information of note
- Critical analysis of data/data source
This graph shows the growth of bacteria at three different temperatures. The number of hours is recorded on the x-axis and the number of bacteria (millions per mm) on the y-axis. The three temperatures analysed are 37 degrees, 25 degrees and 18 degrees centigrade. At time two hours, there are zero bacteria for all three temperatures. Bacterial growth at 37 degrees starts after two hours and reaches a peak of 180 million/mm at around the 10th hour, remaining at this peak until the 14th hour. The number of bacteria shows a gradual decline for the subsequent 10 hours, returning to zero, just before the 24th hour. Bacterial growth at 25 degrees centigrade shows a slower ascent, with bacterial growth commencing just after 2 hours and peaking just after hour 16. The peak number is equivalent at 180 million/mm, with levels maintained at this peak until 20 hours. Thereafter, there is a decline in numbers, with 120 million/mm bacteria at 24 hours. Growth at 18 degrees is slower, taking until 20 hours to peak and remaining at this peak of 180 million/mm bacteria until the end of the data at 24 hours.
These findings can be explained by the fact that bacteria replicate by mitosis, the optimum temperature for which varies between bacteria. However, it is likely that for the particular bacteria, a temperature of 37 degrees is more facilitative for cell division and mitosis than lower temperatures. The data is generally well illustrated, with no anomalies and appears to be from a reliable source.