Answer :
If a 7mm thick plate had been poured, this would affect the size of the inhibition zones, because the inhibition area would be smaller as a greater thickness would require more drugs in the same area.
What is Diffusion Disk?
It is one of the simplest, most reliable and most used susceptibility methods in microbiology laboratories. Its basic principle is the diffusion of the antimicrobial on the surface of the agar, from a disk impregnated with the same antimicrobial.
With this information, we can conclude that if a 7mm thick plate had been poured, this would affect the size of the inhibition zones, because the inhibition area would be smaller as a greater thickness would require more drugs in the same area.
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