9700 · 18.1
Classification
This lesson covers the principles of biological classification, including the binomial system, taxonomic hierarchies, and the evidence used to classify organisms. You will learn to distinguish between morphological and molecular approaches and understand the biological species concept and its limitations. This is a core topic for understanding evolutionary relationships.
Need to know
What you need to know
- The **binomial system** provides a unique, two-part scientific name for every species (e.g., *Homo sapiens*).
- The name consists of the **Genus** (capitalised) and **species** (lowercase), both italicised.
- The **taxonomic hierarchy** arranges organisms into a series of nested groups called taxa.
- The seven main ranks are: **Kingdom, Phylum, Class, Order, Family, Genus, Species**.
Explanation
Classification
- The **binomial system** provides a unique, two-part scientific name for every species (e.g., *Homo sapiens*).
- The name consists of the **Genus** (capitalised) and **species** (lowercase), both italicised.
- The **taxonomic hierarchy** arranges organisms into a series of nested groups called taxa.
- The seven main ranks are: **Kingdom, Phylum, Class, Order, Family, Genus, Species**.