1. Evolution – Station Reviews: Part Two

2. Bell Work Explain what “Common Descent with Modifications” means.
Pick up today’s worksheet up front

3. Station 1: Patterns of Natural Selection
List the three graphing patterns seen with natural selection?
Which natural selection pattern does scenario 1A describe?
Which natural selection pattern does scenario 1B describe?
Which natural selection pattern does scenario 1C describe?

4. Scenario 1A
For birds and parasitoids, females that lay close to the Lack optimum number of eggs have the most surviving offspring. Those that lay fewer or more eggs have lower relative fitness.

5. Scenario 1B
A population of Madagascar hissing cockroaches lives in a woodpile. It suffers heavy predation from lizards. Because their heads are small, the lizards are unable to eat the very largest adult cockroaches, and instead prey upon small and medium sized adults. What type of selection do the lizards impose on the roaches?

6. Scenario 1C
If a cow develops a preference for eating white four o’clock flowers and ignoring pink and red four o’clock flowers, what type of selection is being demonstrated?

7. Station 2: Patterns of Natural Selection
Label the graphs with the correct pattern of natural selection.
Graph 2A = __________________________
Graph 2B = __________________________
Graph 2C = __________________________

8. Graph 2A

9. Graph 2B

10. Graph 2C

11. Station 2: Macroevolution vs. Microevolution
Which category of evolution studies the emergence of new species?
Which category of evolution studies the change in allele frequencies within a population?

12. Station 3:
List the 4 major sources of genetic variation for a population.
____________________ reproduction
Genetic ____________________
____________________ (event that occurs during prophase I of meiosis)
_____________________ assortment of chromosomes

13. Station 3: Microevolution
What type of microevolution is occurring between these populations? _____________________
The beetle is ____________________ from population B and _________________ into population A. (Fill in the blank with the two types of gene flow)
Pop. A
Pop. B

14. Station 3: Microevolution
Which type of microevolution does this picture show?

15. Station 4: Speciation
___________________ isolation is required for speciation to occur.
______________ speciation = a geographic barrier separated the population
______________ speciation = occurs without a geographic barrier

16. Station 4: Speciation
What type of sympatric speciation has occurred when they don’t recognize the mating behaviors anymore?
What type of sympatric speciation has occurred when they no longer breed at the same time of year?
What type of sympatric speciation has occurred when they don’t breed within the same habitat anymore?
What type of sympatric speciation has occurred when their reproductive anatomy no longer fits together?