BRAINCAKEPhylogeny
The hierarchical classification system is based on supposed evolutionary lines of descent.
This supposed evolutionary relationship is known as phylogeny and can be represented by a phylogenetic tree.
The oldest species is found at base of tree, the most recent species are at the end of the branches and lines meet at common ancestors.
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Key terms in this lesson
- gene
- A length of DNA that codes for a polypeptide or a functional RNA molecule, at a specific locus on a chromosome.
- species
- A group of organisms with similar characteristics that can interbreed to produce fertile offspring.
- classification
- The organisation of living organisms into groups based on their similarities and differences.
More in Biodiversity
- Classification
- Taxonomy
- Domain
- Kingdoms
- Index of Diversity
- Example Index of Diversity
- Species Diversity and Ecosystems
- The Impact of Agriculture
All 33 lessons in Biodiversity · All AQA AS-level Biology topics