Evidence of evolution

What is a Homologous Structure

Parts of the body that are similar in structure (same origin) but have different functions

Why does Homologous structure occur?

It happens because of Divergent Evolution

What is a vestigial structure?

It is a structure that has been reduced in size and function hut nay once have been complete and functional

What is DNA Evidence

It is considered as species that share a closer evolutionary relationship, it also shows a higher degree of similarity in their DNA

What is embryological development?

It is when embryos of different species develop in very similar ways, it suggest that there is a common ancestor

How is a fossil record considered as evidence?

It gives us a time scale of how long evolution takes, it also shows us similarities between extinct animals and animals alive today

What are the two models of speed of evolution?

Gradualism and Punctuated Equilibrium

What is gradualism?

It is changes that happen slowly over a long period of time, rather than suddenly

What is punctuated equilibrium?

This model suggest that species often experienced long periods of little or no significant change(equilibrium) later punctuated by short periods of rapid change

Why does punctuated equilibrium happen?

Mass extinction event, migration, Isolation of small populations