Which plant species is not an example of a transgenic plant, thus making it an exception?
Soybean
Maize
Golden rice
Cucumber
In the context of genetically modified organisms (GMOs) and transgenic plants, options that is Soybean, Maize, and Golden rice, respectively, are well-known examples of transgenic plants that have been genetically modified to possess specific traits. However, Cucumber, stands out as it is not typically associated with being a transgenic plant. It is important to note that this does not imply that transgenic cucumbers do not exist, but rather, among the given options, it is not commonly recognized as a transgenic plant.
Hence, the correct answer is option 4.