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Transcript
The broadest and most general category of classification is the DOMAIN The three domains are BACTERIA, ARCHEA, and EUKARYA Organisms are classified into domains based on their cell type and structure Prokaryotes with cell walls containing peptidoglycan. Survive in many environments Can be aerobic or anaerobic Can be autotrophs (make their own food) or heterotrophs More abundant than any other organism Only kingdom is BACTERIA Thought to be the oldest organisms Diverse in shape and nutrition requirements Some autotrophic, most are heterotrophic They are extremophiles, meaning that they live in extreme environments Only kingdom is ARCHAEA Organisms with a membranebound nucleus Consist of the kingdoms: PROTISTA, FUNGI, PLANTAE, and ANIMALIA Eukaryotic organisms that can be unicellular, colonial, or multicellular Classified into three groups: Algae (plantlike), Protozoans (animallike) , and fungus-like protozoans They can be autotrophic or heterotrophic. Example: Paramecium A fungus can be unicellular or multicellular They absorb nutrients from organic materials in the environment Heterotrophs Lack motility (ability to move) Have cell walls Example: Mushroom Multicellular Contain cell walls Contain chloroplasts Mostly autotrophic with a few heterotrophs Possess cells organized into tissue Example: Moss Heterotrophic Multicellular No eukaryotes cell walls Cells are organized into tissues Mostly motile Example: Worm Viruses are motile and contain genetic material, but are not placed in a classification category. This is because viruses do not contain cells, so they are not considered living. They are made of nucleic acid surrounded by protein.