Question

Based on what you know of the animal phylogeny and evolution from introductory biology, do they share these features because they were present in a common ancestor, or did they evolve independently

Answer 1

Answer: they are present in the same ancestry

Explanation: These are key facts

y points:

Phylogenetic trees represent hypotheses about the evolutionary relationships among a group of organisms.

A phylogenetic tree may be built using morphological (body shape), biochemical, behavioral, or molecular features of species or other groups.

In building a tree, we organize species into nested groups based on shared derived traits (traits different from those of the group's ancestor).

The sequences of genes or proteins can be compared among species and used to build phylogenetic trees. Closely related species typically have few sequence differences, while less related species tend to have more.