Some plants have herbicide resistance, but others don't.
If we need a plant to have herbicide resistance, like a crop, we can do the following.
We can take the gene from a herbicide-resistant plant, e.g. a nuisance weed, and insert it into a crop.
Then, when the crop reproduces, there are lots of herbicide-resistant crops being created.
This means that herbicides can be sprayed on weeds near these crops, and only the weeds will die.
This is great for farmers worldwide.
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