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CAIE IGCSE Biology 22.2.4 Interpreting and Evaluating Experimental Data

CAIE IGCSE Biology 22.2.4 Interpreting and Evaluating Experimental Data
Cambridge IGCSE Biology 0610 syllabus for exams in 2026, 2027 and 20282026–2028

Practise evaluating a germination data table by spotting the result that breaks the pH pattern and identifying the Petri dish set up incorrectly.

How this is tested

  • identify the anomalous Petri dish by comparing its germination result with the surrounding pH pattern

Question 5(d)

[Maximum number: 1]

Acid rain has negative effects on many ecosystems.

The second group of students placed 100 seeds in each of five Petri dishes, labelled 1 to 5. Group 2 used the same range of pH values as group 1.

They recorded the percentage of seeds that had germinated after 72 hours.
Their results are shown in Table 5.2.

Table 5.2

Table 5.2

The teacher thought that group 2 had forgotten to add the sulfuric acid to one of their Petri dishes.

Suggest which Petri dish was not set up correctly.