The numbers in a phylogenetic tree typically represent the amount of genetic (or evolutionary) change that has occurred between the species or groups being compared. These numbers are often expressed as branch lengths, with longer branches indicating greater genetic divergence. The units of these numbers can vary depending on the method used to construct the tree.
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The family tree like visual aid for organisms is called a cladogram. It shows the phylogenetic relationships and represents the evolutionary tree of life.
Clasifiaction
No, organisms that are closer together on a phylogenetic tree are more closely related because they share a more recent common ancestor. The further apart two organisms are on the tree, the more distant their relationship.
A phylogenetic tree is typically used to show the evolutionary relationships between animal phyla. It is a branching diagram that resembles a tree and represents the evolutionary history and genetic relationships between different taxa or groups of organisms.
A branching diagram showing evolutionary change is a phylogenetic tree. It represents the evolutionary relationships between different organisms or species by showing their common ancestry and divergence over time. The branching points on the tree indicate where new species or lineages have arisen.