http://www.nytimes.com/2010/05/04/business/energy-environment/04weed.html?pagewanted=all
http://boingboing.net/2012/03/12/why-monsanto-didnt-expect-ro.html
http://www.foodpolitics.com/2012/05/gm-crops-in-crisis-roundup-resistant-superweeds/
http://www.chem.purdue.edu/courses/chm333/Roundup%20Article.pdf
And I totally understand the difficulties at staying up with your schoolwork while working and being a fantastic mom. This is a very open assignment so I hope I can help you with a direction to focus to finish this assignment quicker. I didn't sit and answer everything in detail, but this should help you get jump started on the assignment.
Other facts to note:
- one way farmers fight this problem (as they do with 'superbugs and insecticides') is plant sections of their fields organically, with no chemical added and with no genetically modified seeds. This slows but does not stop the evolutionary change. when you kill 95% of the weeds the remaining 5% have a resistance to your poison. Their descendants will have a higher incidence of that resistance gene than their generation and so on and so on for each generation until everyone is resistant to that poison.
- scientists need to keep researching to find new herbicides and then change the DNA of the soybean to resist that herbicide and the cycle will start over again.
- because companies like monsanto has to keep researching and genetically modifying genes, they don't want lose that money they put into research by farmers saving the seeds from the plant and planting them again the next year for free, so they make the plants that grow from their seeds sterile. Farmers must buy the seeds each year.