1.1 An investigation was carried out to test the effectiveness of four antifungal treatments (Fungiclear, Mycocide, Mycoban, and Fungisan) on preventing the growth of yeast in humans. The petri dish with the treatments and yeast culture used in the investigation was placed in an incubator at 37 °C. The results are shown in the diagram below. Fungiclear- Mycocide Mycoban Fungisan 1.1.1 For this investigation, state the: (a). Dependent variable (b). Independent variable KEY Yeast growth No yeast growth Antifungal treatment 1.1.2 Explain why the investigator put the petri dish in an incubator at 37 °C. 1.1.3 State any TWO factors that the investigator had to control in order for the investigation to be valid. 1.1.4 State TWO ways in which the investigator could have increased the reliability of the investigation. 1.1.5 Arrange the anti-fungal treatments in the order from MOST effective in preventing the growth of yeast to the LEAST effective in preventing the growth of yeast
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