Lecture3 Jan18

Lecture3 Jan18 - 7 Natural Selection – Key points 8 The...

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Today – January 18 II. Evolution by Natural Selection III. The tree of life and understanding phylogenies Please read Section 1.5 on your own! (Know the difference between a hypothesis and a theory; practice questions on Blackboard)
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Check your understanding You should be able to: List the fundamental characteristics of living organisms Define evolution and cite examples that support it. Describe descent with modification Discuss the factors involved in natural selection as a mechanism of evolution. Describe the Tree of Life Interpret a phylogenetic tree. Describe a clade and it’s relationship to a phylogenetic tree Describe shared derived characters and their function in interpreting a phylogenetic tree
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II. Evolution by Natural selection Review: What is evolution? Evolution occurs when there is a change in within a population over time.
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Unformatted text preview: 7. Natural Selection – Key points 8. The central idea of biological evolution is that all life on Earth shares a a. Explains similarities between all life forms B. Explains differences between all life forms III. The tree of life A. Definition B. Three main branches (domains) 1. Archaea 2. Bacteria 3. Eukarya C. We depict the relationships between organisms using a . 1. Phylogeny: D. Reading a phylogenetic tree 1. Root of the tree: 2. Tips of the branches: 3. As you move from the root to the tips, you are moving forward in time. D. Reading a phylogenetic tree 4. Speciation 5. A is a grouping that includes a common ancestor and all the descendants (living and extinct) of that ancestor. E. Building a phylogenetic tree 1. Characters 2. Shared Derived Characters F. Scientific names 1.Genus 2.Species Homo sapiens...
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Lecture3 Jan18 - 7 Natural Selection – Key points 8 The...

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