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7B Science Mrs. Lee Study Guide for A1.3 1. What are the 3 characteristics used to place organisms into domains & kingdoms? • Cell type (prokaryotes or eukaryotes) • Cell number (unicellular or multicellular or both) • Ability to make food (autotrophs or heterotrophs or both) 2. What are prokaryotes & eukaryotes? • prokaryotes = organisms with NO nucleus in their cells • eukaryotes = organisms with nuclei (singular = nucleus) in their cells 3. What is a nucleus? • Nucleus = a dense area that contains nucleic acids 4. How are Bacteria and Archaea similar or different? • Both bacteria & archaea are unicellular prokaryotes that include autotrophs and heterotrophs. • Bacteria and archaea differ in their chemical make-up and structures! • Archaea lives in extreme conditions such as deep sea vents, hot springs, very salty water, swamps, and intestines of cows. These conditions might be similar to ancient Earth. 5. What are the characteristics in all 3 Domains? Domain/Kingdom Cell Type Cell Number Feeding Pattern Examples Domain Bacteria Prokaryotes Unicellular Autotrophs, Heterotrophs Yogurt, E.coli Domain Archaea Prokaryotes Unicellular Autotrophs, Heterotrophs Deep sea archaea Domain Eukarya, Kingdom Protists Eukaryotes Unicellular, Multicellular Autotrophs, Heterotrophs Amoeba, seaweed, paramecium Domain Eukarya, Kingdom Fungi Eukaryotes Unicellular, Multicellular Heterotrophs Mushroom, mold Domain Eukarya, Kingdom Plants Eukaryotes Multicellular Autotrophs Tree, grass Domain Eukarya, Kingdom Animals Eukaryotes Multicellular Heterotrophs Human, dog, cat