hmmm... i don't know any good sites, but i can post one of my research papers. i'm a pretty decent writer and i got an a for it, so here you go. i don't know what level of writing or research your teacher is asking for, but this is from a high school assignment.
Genetically Modified Food
Genetically modified foods are beginning to appear more and more in US grocery stores. But what exactly is this process? Scientists have started modifying crops since the 1990’s, pulling out unwanted genes and replacing them with better ones. If some plant species, like wheat, was very susceptible to death in droughts, an engineer could find a gene in another organism and switch the two. This would make a new, improved type of wheat that had the same drought-surviving qualities as the donor organism. Corn, tomatoes, strawberries, canola, and soybeans are just a few crops that have been genetically engineered in the last several years.
Corn is very often genetically modified to be sweeter. By changing a gene that controls the altering of sugar to starch, corn would stay sweeter for a longer amount of time. Corn modified with a chemical called Bacillus thuringiensis, also called B.t. corn, kills pests that try to eat it.
Tomatoes have been commonly engineered to ripen less quickly. By removing a gene that makes them ripen then rot, tomatoes are picked at a stage called mature green. Then they are shipped to a destination, where they are placed in a cool chamber. In the chamber, the chemical ethylene, the same that was removed earlier, is spread in gas form throughout the room. This allows the ripening process to be monitored and stopped at any time. The tomatoes are then sold in a supermarket, with much longer shelf lives.
Genetically modified foods could greatly aid our economy and the growing population’s food demands. Many reasons, such as cold tolerance, pest resistance, and medicinal value, support GM foods in their quest to hit store shelves everywhere.
Genetically engineering crops to better withstand cold would help farmers have a better harvest, thus aiding our economy. Produce would be more likely to survive harsh winters, which is becoming increasingly more necessary given our climate change. Many plants like strawberries cannot endure too chilly of weather. By changing their genetic makeup for that specific characteristic, strawberries would stay alive through frosty conditions much better than previously.
Herbicide tolerance is a major asset to an argument for GMOs. A large problem in the agricultural business is weeds. It is a huge hassle to pull them out by hand, but weed-killer can damage your crop too. Some people propose to modify plants to be unaffected by a powerful weed-killer, then use only that weed-killer on plants to prevent harming the environment.
There is also negative feedback on the topic of GM foods. The unintentional harm of other individuals and unknown health hazards for humans pose a great counterargument questioning the use of genetically modified crops in groceries.
In a study shown in Nature magazine, it was discovered that the pollen from B.t. corn was killing many monarch butterfly caterpillars. The pollen would be carried by the wind to nearby milkweed plants. When the caterpillar hatched and ate the leaf of milkweed on which it lay, it might eat some of the corn pollen and die. B.t. contaminants have been known to kill many other insects. B.t. toxins cannot be made to not affect these other victims.
Many children in the US have allergies to all kinds of substances. Modifying plants may create yet another material to which people are allergic. Doctors could have to quickly create an antibody to save these people from sickness and possibly death.
Many reasons both support and criticize genetically modified crops. Now that you know the process and some of the arguments, decide for yourself whether it is a worthy idea to carry out.
• “Genetically modified food.” 15 Oct. 2008 http://en.wikipedia.org/wiki/Genetically_modified_food
• Pusztai, Arpad. “Genetically Modified Foods: Are They a Risk to Human/Animal Health?” ActionBioscience.org. 15 Oct. 2008 http://www.actionbioscience.org/biotech/pusztai.html
• Whitman, Deborah B. “Genetically Modified Foods: Harmful or Helpful?” 2000 15 Oct. 2008 http://www.csa.com/discoveryguides/gmfood/overview.php
in order to make such a detailed bibliography (works cited, sources, all the same thing) without the hassle of looking up authors, etc. i used a bibliography maker site called bibme.org. it's great, you just plug in the website you used, it loads the info, and when you have all your sites, you just download it to a word document.