These images from the Smithsonian Institution depict Nancy Knowlton's work with snapping shrimp in Panama. Knowlton found that the closing of the isthmus -- dividing the Pacific Ocean from the Caribbean -- resulted in new species of shrimp.
This annotated slideshow adapted from KET's Electronic Field Trip to the Forest illustrates how blight decimated the American chestnut tree and the methods scientists use to identify and pollinate the remaining trees to create blight-resistant trees.
This video segment from FRONTLINE/NOVA: "Harvest of Fear" explains that genetic engineering and classical breeding both alter the genetic makeup of crop plants.
This fun Web site is part of OLogy, where kids can collect virtual trading cards and create projects with them. Here, they learn about the many ecosystems in the ocean. The site opens by telling kids that people have learned to change the food we eat. The first comic strip looks at a farmer who works to produce a larger, redder, tastier tomato. The second comic strip tells kids about genetic modification and imagines a scientist putting the flounder's "anti-freeze" gene inside the DNA of a tomato. Food for Thought presents kids with two scenarios about genetically modified food, asking them if they think they're good ideas.
This video segment from Kentucky Life describes how scientists control pollination of one of the few remaining American chestnut trees to develop blight resistant trees.
Set the class up with the following scenario. You want to breed a horse in order to sell the foal to make money. What do you do?
