Nodes
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.
Analogy
Think of nodes like intersections in a city. Each intersection (node) is the point where different streets (lineages) diverge. The intersection itself represents the place where all these streets were once connected, just as a node represents the common ancestor of different species.
Related terms
Phylogenetic Tree: A diagram showing evolutionary relationships among organisms based on their genetic similarities and differences.
Branches: These are lines in a phylogenetic tree that represent lineages evolving over time.
Clade: A group of organisms believed to have evolved from a common ancestor, according to the principles of cladistics.
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