Respuesta :

Answer:

Time allowed for incubation, size of the dish, the amount of light, amount of agar, the type of agar…etc

Explanation:

  • Time of incubation
  • Size of the dish
  • Amount of light

We define a control variable as any variable that has to be held constant during a study.

If i wish to study what temperature allows for bacterial growth to occur quickly, i will have to subject different bacterial cultures to different temperatures.

The variables that must remain the same across all these cultures at different temperatures is what we call the control variables. They ensure that the results of the study are reliable.

Such variables include but are not limited to;

  • Time of incubation
  • Size of the dish
  • Amount of light

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