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. 1.1 Mycicide 1.2 1.3 1.4 Fungiclear State the: (a) Dependent variable (b) Independent variable Mycoban Fungisan R 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. State any TWO factors that the investigator had to control in order for the Investigation to be valid. (2) State TWO ways in which the investigator could have increased the reliability of the investigation.
