Question

what is this diagram called? what does this diagram tell us?

Explanation:

This diagram is a phylogenetic tree which shows the evolutionary relationships among various groups of organisms. It uses shared characteristics like the presence of vertebrae, four - limbs, amniotic eggs, hair/fur, and egg shells to illustrate how different vertebrate groups are related.

Answer:

This diagram is called a phylogenetic tree. It tells us about the evolutionary relationships among different vertebrate animals based on shared anatomical and reproductive characteristics.