Structure and Function in Living Things Chapter Fifteen: The Diversity of Life 15.1 Taxonomy and Systematics 15.2 Algae and Fungi.

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Presentation transcript:

Structure and Function in Living Things

Chapter Fifteen: The Diversity of Life 15.1 Taxonomy and Systematics 15.2 Algae and Fungi

Investigation 15A What type of information can be used to create a cladogram? Creature Cladogram

15.1 Taxonomy and Systematics Scientists classify organisms according to their characteristics and evolutionary relationships. This process is called systematics.

15.1 Taxonomy and Systematics A Swedish scientist and explorer named Carolus Linnaeus (1707–1778) developed a system of classification called taxonomy in the 1700s. Linnaeus classified living things according to their shared characteristics. There are currently seven levels of classification.

15.1 Scientific Names A scientific name is the two-part, scientifically recognized name given to an organism, consisting of its genus and species.

15.1 Scientific Names You may have a difficult time understanding scientific names because they are usually in Latin or Greek. Felis is Latin for “cat” and domesticus is Latin for “domesticated.”

15.1 What is systematics? Darwin’s theory of evolution led to the development of systematics. Systematics is the process of classifying living things according to evolutionary relationships. Today, scientists may use DNA analysis to classify living species.

15.1 What is systematics? The evolutionary development of primates can be shown on a simple cladogram. The characteristics listed along the right distinguish the levels above each node (the point where two branches meet). The nodes indicate a common ancestor between two groups.

15.1 Evolution and the six kingdoms An evolutionary tree is a diagram with many branches that shows evolutionary relationships among organisms, both living and extinct. In a complete evolutionary tree, the levels of classification (phylum, class, order, etc.) would branch off from each kingdom all the way down to the species level.