physiological, addition of a bitter taste to the plant's leaves
Herbicide Tolerant (HT) soybeans are a variety of genetically modified soybean that have been modified to be herbicide resistant.
Yes, soybeans have been genetically modified, though there are non-modified varieties of soybeans. Commercially, at least 70% - 80%, possibly more of the soybeans grown in the United States are GMO.
Genetically engineered crops, like corn and soybeans, are examples of biotechnology.
In general, non-genetically modified foods of any type (including whole soybeans) are preferred to the their genetically modified counterparts because the long-term health effects of consuming genetically modified foods have not been properly documented yet. There may be unanticipated health risks with consuming certain genetically modified foods.
It does not if the the seeds have not been genetically modified and no cross pollination with genetically modified herbs occurs. To this date (February 21, 2012) it appears that no interest has been shown by companies who bio-engineer foods to genetically modify herbs. The interest seems to be focused on vegetables (corn and soybeans in particular) and trees (Papayas grown in Hawaii and other places), though other kinds of plants have also been genetically modified.
Much of the corn and soybeans grown in Iowa are genetically modified (GM). Very little of any of the other crops have any significant modification done to them.
Some, though not all, corn and soybeans grown in the US have been genetically modified.
Nearly all soybeans on the market today have been genetically altered to be protected from the effects of Round-Up herbicides. The rights to all seed are owned by one cooperation that I can't think of offhand. See Food Inc./Soybeans for more info.
Roundup ready is a term to describe a genetically modified crop. It is mainly referred to soybeans, named "roundup ready soybeans". These are unquestionably a wary food source on terms of safety, despite the fact that it is resistant to glyphosphate.
Pollen from GMO plants can (and do) cross pollinate with organically grown plants of the same species (corn with corn, soybeans with soybeans, etc.), which results in contamination of the organically grown plants.
Quite a few plants have been so modified, including corn, cotton, soybeans, and canola.
Genetically modified food is so cheap because the processes used in growing it is supposedly "faster, better, and cheaper." Most soybeans, which are in most of the foods we consume, are genetically modified and nobody really knows. Companies just want to grow more for cheap then sell more at a cheap price.