Levels of Biological Classification

Front

What is the main purpose of biological classification?

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To organize and categorize living organisms based on shared characteristics and evolutionary relationships.

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What are the primary levels of biological classification?

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Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species.

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What is a phylogenetic tree?

Back

A diagram that represents the evolutionary relationships among various biological species based on similarities and differences in their physical or genetic characteristics.

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What is the most specific level of classification?

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Species.

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What type of organism is prokaryotic, unicellular, and autotrophic?

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Bacteria.

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What is a dichotomous key?

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A tool that allows the user to determine the identity of items in the natural world by answering a series of questions that lead to the correct name.

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What is the difference between a genus and a species?

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A genus is a group of closely related species, while a species is the most specific level of classification that identifies a single type of organism.

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What characteristics define the Kingdom Animalia?

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Multicellular, eukaryotic organisms that are heterotrophic and typically have specialized tissues.

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What is the significance of the Order Araneae?

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It is the classification for spiders, which are characterized by having eight legs and the ability to produce silk.

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How do scientists determine evolutionary relationships in a phylogenetic tree?

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By analyzing genetic, morphological, and behavioral traits of organisms.