06_Introduction to Evolution - ± how a population changes...

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INTRODUCTION TO EVOLUTION Reading: Chapter 22 A. WHAT IS EVOLUTION? 1. The reality of evolutionary change is the central fact of biological science. "Nothing in biology makes sense except in the light of evolution." – Theodosius Dobzhansky (1900 – 1975) 2. Evolution consists of heritable changes in a population or a group of populations over time, and the divergence and diversification of lineages as a result of these changes. 3. Levels of change microevolution macroevolution 4. Two basic issues in evolutionary biology
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Unformatted text preview: ± how a population changes and adapts over time ± how new species arise Introduction to Evolution - 2 5. The reality of evolution forces us to consider organisms in both functional and historical terms. B. EVOLUTION – FACT AND THEORY 1. The fact of evolution 2. Evolutionary theory 3. The phrase ‘the theory of evolution’ is misunderstood by almost all non-biologists, and should not be used. Questions Questions pertaining to the entire topic of evolution will given at the end of the section “Speciation”....
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