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Mid-term exam study guide Unit 1Know and understand the ‘properties/characteristics of life’ Be able to list the hierarchy of life in order molecule, cell, tissue, organ, organ system, organism, population, community, ecosystem, biosphere.Know the differences between Species-a group of organisms that share a genetic heritage, can interbreed, and create offspring that are also fertile.PopulationEcosystemOrganismUnderstand the levels of organization of living things-In sequence, they are represented as atoms, molecules, organelles, cells, tissues, organs, organ systems, organisms, population, community, ecosystem, biome, and biosphere.Differences between:Prokaryotic- are single-celled organisms that are the earliest and most primitive forms of life on earth.Eukaryotic-are cells that contain a nucleus and organelles and are enclosed by a plasma membrane.
Types of organisms in the various domains:Archaea- are a domain of single-celled microorganisms. They have no cell nucleus or any other organelles inside their cells. In the past Archaea were classified as an unusual group of bacteria and named archaebacteria, but since the Archaea have an independent evolutionary history and