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Applying the Linnaean system to classification

Inheritance, variation and evolution • Classification of living organisms

Key concepts

What you'll likely be quizzed about

  • Taxonomic classification bestows a structure, arranging groups from broad to narrow: kingdom, phylum, class, order, family, genus, species.
  • Each lower rank includes organisms that share specific characteristics.
  • For instance, the genus Panthera encompasses big cats with close structural traits, while the species name identifies distinct species within that genus.

Flashcards

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How does given anatomical information cause placement at a taxonomic rank?

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Shared diagnostic anatomical features indicate membership in the same taxon; more specific features cause assignment to lower ranks.

Key notes

Important points to keep in mind

Hierarchy: Kingdom → Phylum → Class → Order → Family → Genus → Species.

Binomial names: Genus (capitalized), species (lowercase), italicized or underlined when handwritten.

Abbreviate genus after first full appearance, ensuring no confusion with other genera.

Species defined by the ability to interbreed and produce fertile offspring.

Use shared diagnostic traits for grouping; more traits lead to narrower ranks.

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