The 2005 version of the Regents High School Examination in ecology is as comprehensive as previous years' exams. It consists of 40 multiple-choice questions on topics ranging from the structure of DNA to interactions within an ecosystem....

Ninth graders describe the six levels of ecological organizations and give examples of each. They also differentiate between food chains and webs and identify trophic and consumer levels in food chain and food webs.

Students explore the ecosystem by reviewing scientific vocabulary terms. In this environmental awareness lesson, students identify the differences between abiotic and biotic factors and their relationship to the Earth. Students define...