🧬ap biology review

Nodes

Written by the Fiveable Content Team • Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 examWritten by the Fiveable Content Team • Last updated September 2025

Definition

In phylogenetics, nodes are points on a tree where a lineage splits into two or more separate lineages. They represent the most recent common ancestor of the lineages that branch from them.