Section 3: Domains and Kingdoms

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Presentation transcript:

Section 3: Domains and Kingdoms The most widely used biological classification system has six kingdoms within three domains. K What I Know W What I Want to Find Out L What I Learned

Essential Questions What are the major characteristics of the three domains? What are the differences among the six kingdoms? How are organisms classified at the kingdom level? Copyright © McGraw-Hill Education Domains and Kingdoms

Vocabulary Review New eukaryote archaea protist fungus Domains and Kingdoms Copyright © McGraw-Hill Education

Grouping Species The broadest category in the classification used by most biologists is the domain. Three domains: Bacteria, Archaea, Eukarya Six kingdoms: Bacteria, Archaea, Protists, Fungi, Plantae, and Animalia Organisms are classified into domains based on cell type and structure. Organisms are classified into kingdoms based on cell type, structure, and nutrition. Copyright © McGraw-Hill Education Domains and Kingdoms

Domain Bacteria Bacteria are members of both Domain and Kingdom Bacteria Prokaryotes Cell walls contain peptidoglycan Diverse group that can survive many different environments Most bacteria are heterotrophs that get their energy from other organisms Most abundant organism on the planet Copyright © McGraw-Hill Education Domains and Kingdoms

Add link to virtual lab from page 499 here. Classifying Bacteria Virtual Lab FPO Add link to virtual lab from page 499 here. Copyright © McGraw-Hill Education Domains and Kingdoms

Domain Archaea Archaea are thought to be more ancient than bacteria and yet more closely related to our eukaryote ancestors. Lack peptidoglycan in their cell walls, and have some of the same proteins as eukaryotes. Archaea are diverse in shape and nutrition requirements. Most are heterotrophs, some are extremophiles that can survive extreme conditions (e.g. high temperature, salinity) Copyright © McGraw-Hill Education Domains and Kingdoms

Domain Eukarya All eukaryotes have a membrane-bound nucleus and other membrane-bound organelles. Domain Eukarya contains Kingdoms Protista, Fungi, Plantae, and Animalia. Copyright © McGraw-Hill Education Domains and Kingdoms

Domain Eukarya Kingdom Protista Protists are eukaryotic organisms that can be unicellular, colonial, or multicellular. Protists are classified into three different groups – plantlike, animal-like, and funguslike. Copyright © McGraw-Hill Education Domains and Kingdoms

Add link to BrainPOP from page 501 here. Six Kingdoms BrainPOP FPO Add link to BrainPOP from page 501 here. Copyright © McGraw-Hill Education Domains and Kingdoms

Domain Eukarya Kingdom Fungi A fungus is a unicellular or multicellular eukaryote that absorbs nutrients from organic materials in its environment. Heterotrophic, lack motility, have cell walls containing chitin. Have threadlike structures called hyphae for feeding, growth, and reproduction Copyright © McGraw-Hill Education Domains and Kingdoms

Domain Eukarya Kingdom Plantae Mostly multicellular, have cell walls composed of cellulose. Most contain chloroplasts for photosynthesis, but a few plants are heterotrophs Many plants possess organs such as roots, stems, and leaves. Copyright © McGraw-Hill Education Domains and Kingdoms

Domain Eukarya Kingdom Animalia All animals are heterotrophic, multicellular eukaryotes. Have cells organized into tissues and organs as well as complex organ systems. Most animals are motile for at least a portion of their life cycle. Copyright © McGraw-Hill Education Domains and Kingdoms

Add link interactive table from page 502 (Table 3) here. Kingdom Characteristics Interactive Table FPO Add link interactive table from page 502 (Table 3) here. Copyright © McGraw-Hill Education Domains and Kingdoms

Domain Eukarya Viruses—an exception A virus is a nucleic acid surrounded by a protein coat. Viruses do not possess cells, nor are they cells, and are not considered to be living. Because they are nonliving, they usually are not placed in the biological classification system. Copyright © McGraw-Hill Education Domains and Kingdoms

Review Essential Questions Vocabulary archaea protist fungus What are the major characteristics of the three domains? What are the differences among the six kingdoms? How are organisms classified at the kingdom level? Vocabulary archaea protist fungus Copyright © McGraw-Hill Education Domains and Kingdoms