evolutionary trees page from darwin's notebooks around july 1837 showing his first sketch of an...
TRANSCRIPT
EVOLUTIONARY TREES
Page from Darwin's notebooks around July 1837 showing his first sketch of an evolutionary tree
Evolutionary Trees• Diagram that reflects the evolutionary relationships among groups of
organisms• HYPOTHESIS – summarizes our current understanding of evolutionary
relationships between living things – both extant and extinct; testable• EVIDENCE BASED – anatomy, biochemistry, fossils etc; the more data
sets that support the tree the more confident we are that we are correct• SCIENTIFIC MODEL - testable idea created by the human mind that
tells a story about what happens in nature; a description of nature that can predict things about many similar situations - The value of a model is that we can trust its predictions about similar situations even if we don’t encounter each situation; a diagram, an equation, a physical model, etc.
ANY QUESTIONS?