Classification, Cladograms & Dichotomous Keys

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What is the definition of Archaebacteria?

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Archaebacteria are prokaryotic, unicellular organisms that can be autotrophic or heterotrophic, and have cell walls that do not contain peptidoglycan. They are known for surviving in extreme conditions.

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What is a dichotomous key?

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A dichotomous key is a tool used to identify organisms by answering a series of questions that lead the user to the correct name of a given item.

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What is the purpose of a cladogram?

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To map the ancestral relationships and shared traits of different organisms.

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What are extremophiles?

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Extremophiles are organisms that thrive in extreme environmental conditions, such as high temperature, acidity, or salinity.

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What characteristics define arachnids?

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Arachnids are characterized by having eight legs, a segmented body, and no antennae.

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What is the difference between autotrophic and heterotrophic organisms?

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Autotrophic organisms produce their own food through photosynthesis or chemosynthesis, while heterotrophic organisms obtain their food by consuming other organisms.

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What is the classification hierarchy in biology?

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The classification hierarchy includes the following levels: Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species.

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What is the significance of shared traits in cladistics?

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Shared traits are used to determine evolutionary relationships among organisms and to construct cladograms.

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What is the role of a taxonomist?

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A taxonomist is a scientist who classifies and names organisms based on shared characteristics and evolutionary history.

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What is the difference between Eubacteria and Archaebacteria?

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Eubacteria are prokaryotic organisms with peptidoglycan in their cell walls, while Archaebacteria lack peptidoglycan and often live in extreme environments.