BI-1488
Antibiotic resistance
Biology · Secondary 4 · Medium · Antibiotic resistance
A farmer sprays herbicide on a field. The herbicide kills most of the weeds but not all. After several years of repeated spraying, many weeds in the field are resistant to the herbicide. Which process best explains the increase in herbicide-resistant weeds?
- Resistant weeds survive and reproduce, passing the resistance allele to offspring.
- The herbicide causes new resistance mutations in every weed.
- Weeds become used to the herbicide and develop immunity during their lifetime.
- Non-resistant weeds change their genes so they can survive the herbicide.
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