Which term refers to a herbicide that kills only certain plants without killing others?

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Multiple Choice

Which term refers to a herbicide that kills only certain plants without killing others?

Selective herbicide kills only certain plants while sparing others. This selectivity comes from differences between the weed and the crop in physiology, metabolism, or how the plant takes up and moves the chemical, so the weed is affected while the crop remains unharmed. In practical use, this lets you control weeds without harming the desired plants. The other terms describe how the herbicide acts rather than which plants it kills: systemic indicates movement through the plant, contact affects only the tissues touched, and non-selective harms a wide range of plants.

Selective herbicide kills only certain plants while sparing others. This selectivity comes from differences between the weed and the crop in physiology, metabolism, or how the plant takes up and moves the chemical, so the weed is affected while the crop remains unharmed. In practical use, this lets you control weeds without harming the desired plants. The other terms describe how the herbicide acts rather than which plants it kills: systemic indicates movement through the plant, contact affects only the tissues touched, and non-selective harms a wide range of plants.

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