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Reproduction Sexual: ensures a mixing of the gene pool of the species. Asexual: reproduction is the formation of new individuals from the cell(s) of a single parent. Binary fission: bacteria making copies of themselves. Modes of Nutrition Autotrophic: Make its own food (Plant) Heterotrophic: Must consume food Absorbtion: the strands absorb nutrients and water from their surroundings (mushrooms) Cell Number Unicellular: consists of one cell Multicellular: cell consists of more than one Cell Structure Eukaryotic organism- have cells that have a true membrane-bound nucleus, and organelles. Prokaryotic organism- have cells that do not have a true membrane bound organelles and lacks a nucleus. THREE-DOMAIN SYSTEM What is a domain? Domain- are three broad groups: plants, animals, and fungi, includes all the eukaryotes. What are the three domains? Domains Domain Archaea- is Kingdom Archaebacteria. Domain Bacteria- is Kingdom Bacteria Domain Eukarya- consist of the protists, the fungi, the Plantae and Animalia. Kingdoms Kingdom Archaebacteria Cell Structure: Prokaryotes (no nucleus) distinctive cell membrane Cell Number: are unicellular Cell Reproduction: Binary Fission Mode of Nutrition: Autotrophic/heterotrophic live in harsh environments Kingdom Eubacteria Cell Structure: prokaryotes (no nucleus) common bacteria Cell Number: are unicellular Cell reproduction: by binary fission Mode of Nutrition: Autotrophic and Heterotrophic , Kingdom Protista Cell Structure: eukaryotic yes nucleus Cell Number: most are singlecelled organisms (amoeba) but some are multicellular (giant kelp) Cell reproduction: reproduce by binary fission & sexual cycles Mode of Nutrition: heterotrophic/autotrophic Kingdom Fungi Cell Structure: eukaryotic yes nucleus Cell Number: unicellular and multicellular Cell Reproduction: reproduce by binary fission or some form of sexual reproduction. Mode of Nutrition: heterotrophic absorbs nutrient Kingdom Plantae Cell Structure: eukaryotic yes nucleus Cell Number: multicellular Cell Reproduction: sexual cycle based on meiosis, Mode of Nutrition: Autotrophic Kingdom Animalia Cell Structure: eukaryotic yes nucleus Cell Number: multicellular Cell Reproduction: most have a standard sexual cycle. Mode of Nutrition: heterotrophic