Warm Up 7 Punctuated equilibrium coevolution adaptive radiation Convergent evolution development of genes/body plans 1. When a single species or small group of species has evolved into several different forms that live in different ways 2. The process by which unrelated organisms come to resemble one another 3. Compare similar body plans in different organisms 4. The process by which 2 species evolve in response to changes in each other over time 5. long stable periods of no change interrupted by brief periods of rapid change 6. What are 2 ways to date fossils?

17-4 Patterns of Evolution macroevolution The large scale evolutionary changes that take place over long periods of time

6 Important Patterns of Macroevolution Mass extinction Adaptive radiation Convergent evolution Coevolution Punctuated equilibrium Changes in developmental genes

1. Mass Extinction >99% of all species lived are extinct Each disappearance left habitats open and provided ecological opportunities for those that survived Dinosaurs made way for mammals

2. Adaptive Radiation When a single species or small group of species has evolved into several different forms that live in different ways -Galapagos finches Dinosaurs went through first

3. Convergent Evolution The process by which unrelated organisms come to resemble one another

4. Coevolution The process by which 2 species evolve in response to changes in each other over time

5. Punctuated equilibrium long stable periods of no change interrupted by brief periods of rapid change

6. Development of Genes and Body Plans Compare similar body plans in different organisms

3/15 Warm Up 1. Random change in allele frequency 2. Situation in which allele frequencies remain constant. 3. 5 conditions of Hardy Weinberg principle.

Disruptive, direction, or stabilizing? 4. Occurs when individuals at one end of the curve have higher fitness than individuals in the middle or at the other end Human babies born at an average weight are more likely to survive than babies born either much smaller or much larger than average. Average-sized seeds become less common, and larger and smaller seeds become more common. Results in two subgroups.

7. Give an example of behavioral isolation 8. Give an example of geographic isolation 9. Give an example of temporal isolation 10. What is the first step in the speciation of Darwin’s finches?

microevolution