The diagram shows one way of testing the effect of an antibiotic on bacteria.
The table shows the results of testing five different types of bacteria. Zones of less than 13 mm show the presence of resistant bacteria.
Which statement can be supported by this data?
1 )
Bacteria become more resistant to antibiotics over time.
Only types 2, 3 and 4 of the bacteria show resistance to the antibiotic.
3 )
The antibiotic can be used to treat all the types of bacteria.
4 )
Type 5 of the bacteria can never become resistant to the antibiotic.
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