Question

what does the first point on an evolutionary tree show? the species size the homologous trait the last species the common ancestor

Explanation:

An evolutionary tree, also known as a phylogenetic tree, is a diagram that shows the evolutionary relationships among various biological species or other entities. The first point (root) of an evolutionary tree represents the common ancestor from which all the species or groups in the tree have descended. Species size is not represented by the root of the tree. Homologous traits are characteristics that are similar due to shared ancestry and are shown as branches or nodes in the tree, not the root. The "last species" is not a term related to the root of an evolutionary tree.

Answer:

the common ancestor