The graph pictured shows bacterial growth, in a petri dish, in which no additional resources are added over time, The graph pictured shows bacterial growth, in a petri dish, in which no additional resources are added over time.
Sterile powdered agar with nutrients can be mixed with moisture, heated and then rushed into empty petri plates or ready-to-use dishes can be purchased.
The undigestible agar is a gelatin-like substance with a semi solid surface on which the bacteria can grow while they engulf the added nutrients
Thus, option "D" is correct.
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