How To Read Phylogenetic Tree?

Identify the root of the tree

Read from the root toward the tips

Compare branching points to find common ancestors

Note that each node represents a divergence event

Determine which taxa share the most recent common ancestor

Use branch lengths only if the tree is scaled

Ignore the left-to-right order of tips unless specified

Check whether the tree is rooted or unrooted

Compare clades to see which groups are related

Look for sister taxa that share a direct node

Trace lineage splits backward to infer evolutionary relationships

Use the tree topology to compare relatedness

Interpret closer nodes as more recent shared ancestry

Treat tip labels as the observed species or sequences

Read internal nodes as hypothetical ancestral lineages

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