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Which of the following is not a synthetic auxin?
Option: 1
1-naphthaleneacetic acid
Option: 2
2,4-dichlorophenoxyacetic acid (2,4-D)
Option: 3
2,4,5-trichlorophenoxyacetic acid (2,4,5-T)
Option: 4
Indole-3-butyric acid
Answers (1)
Synthetic Auxins:
- Synthetic auxin analogues include 1-naphthaleneacetic acid, 2,4-dichlorophenoxyacetic acid (2,4-D) and many others.
- Some synthetic auxins, such as 2,4-D and 2,4,5-trichlorophenoxyacetic acid (2,4,5-T), are also used as herbicides.
- Broad-leaf plants (dicots), such as dandelions, are much more susceptible to auxins than narrow-leaf plants (monocots) such as grasses and cereal crops, so these synthetic auxins are useful as synthetic herbicides.
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