18.3 Building the Tree of Life .docx - Name Rania Aziz...

This preview shows page 1 - 2 out of 4 pages.

Name Rania Aziz Class Date 18.3 Building the Tree of Life Lesson Objectives Name the six kingdoms of life as they are currently identified. Explain what the tree of life represents. Lesson Summary Changing Ideas About Kingdoms As biologists learned more about the natural world, they realized that Linnaeus’s two kingdoms, Animalia and Plantae, did not represent all life. Researchers found that microorganisms were very different from plants and animals. They were placed in their own kingdom, called Protista. Then, yeast, molds, and mushrooms were separated from plants and placed in their own kingdom, called Fungi. Because bacteria lack nuclei, mitochondria, and chloroplasts, they were separated from Protista and placed in another new kingdom, called Monera. In the 1990s, kingdom Monera was divided into two kingdoms: Eubacteria and Archaebacteria. The six-kingdom system of classification includes the kingdoms Eubacteria, Archaebacteria, Protista, Fungi, Plantae, and Animalia. Genetic analysis revealed that two prokaryotic groups are even more different from each other, and from Eukaryotes, than previously thought. This discovery lead to the creation of a new taxon, called the domain. The domain is a larger, more inclusive category than a

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture