... were light brown speckled with green. There were always a few dark-colored moths around, but light colored moths were the most common. Then, the Industrial Revolution began in England and pollution stained the tree trunks dark brown. At the same time, biologists noticed that more dark-colored moths were appearing. The evolutionary hypothesis suggested that birds were the main reason. Birds ... enough, and more experiments had to be made. A British ecologist, called Kettlewell, prepared another test for this hypothesis. He placed equal numbers of light and dark colored moths in two types...

• Word Count: 1784
• Approx Pages: 7
• Grade Level: High School

... been made include corn with increased starch levels, amino acid enhanced corn for animal feed and beta-carotene producing rice. The use of genetically altered crops can help reduce the pollution due to the use of harmful pesticides and insecticides. These plants will deter insects and resist fungus with the minimum use of chemicals. This in turn means that less of ... a smaller amount of glutamic acid decarboxylase, a protein normally found in the pancreas, which for reasons that are unknown triggers a self-destructive immune response. In Type I diabetes this protein causes certain type...

• Word Count: 1530
• Approx Pages: 6
• Has Bibliography
• Grade Level: Undergraduate