BIOLOGY
Vertebrate class relationships
Vertebrate class relationship tree
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CASE ANALYSIS
Scenario
A biology lesson needs a selected vertebrate tree with quantitative branch lengths.
Key decisions
- Outgroup: Use lamprey to orient the selected comparison.
- Clades: Highlight tetrapods and amniotes.
- Scale: Label branch length as substitutions per site.
When to reuse this
Use this for an introductory relationship diagram, not as a complete taxonomy.
FAQ
Frequently asked questions
What does the branch scale mean?
It represents inferred substitutions per site, a measure of evolutionary change.
Why is lamprey included?
It provides an early-diverging reference in this selected vertebrate comparison.
Is this a complete vertebrate tree?
No. It uses selected groups to explain the major labelled clades.
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phylo-vertebrate-class-relationships