Print this Web Links Activity Log to record your findings. In order to view and print these activities, it is necessary to have Adobe Acrobat Reader. If you do not have this, get the free download now. Click the Techie Toolbox for tips and help to make the most of your time on the Web. Unit 5: Change Through Time   Chapter 17: Organizing Life's Diversity   p. 452 The Tree of Life Visit this site to learn more about the phylogenetic relationships of organisms. To which group do frogs belong? What are their closest living relatives? p. 458 National Science Teachers Association For over half a century, the National Science Teachers Association has been supporting science educators. Visit their Web site and check out the "What's Hot" section. Summarize one of the topics in your science journal. p. 475 Dichotomous Key Directions Visit this online dichotomous key for identifying conifers. Gather some samples from a conifer in your area and use the key to identify the genus. p. 476 Non-Human Animals How Biological Clocks Work: The National Institutes of Health site on biological clocks has a wealth of information about circadian rhythms. When was the first circadian gene located? In what animal was it located? Biotiming Tutorial - Human Clocks This tutorial will guide you through the research leading up to what is presently understood about human biological clocks. What part of the brain regulates your biological clock? p. 374 Unit 5: Change Through Time Geology and Geologic Time This site provides information about the geologic relationships of rock layers, as well as much about geologic time and the history of the earth. As a group project, develop a poster showing the different eras of geologic time. Paleontology Without Walls Visit the virtual exhibits at this site to learn more about paleontology. Use the information on this site to construct your own geologic time line and display it in your classroom. Natural Perspective This site gives information about organisms in kingdoms: Monera, Protoctista (Protista), Fungi, Plantae, and Animalia. Click on the links to visit the kingdoms. Create your own dichotomous key to classify the different kingdoms and phylums.   Additional Unit Research Links Seven Bioscience Challenges - Articles in Bioscience At this site, sponsored by BioScience Productions, Inc., you can explore issues such as biodiversity, the environment, genomics, biotechnology, and evolution. Choose a topic and read some of the articles in that category. What are some of the major issues concerning biologists today? Write a report on your topic and present it to the class.