1. The Chapter 22 Homework is due on Tuesday, March 10 at 11:59 pm. There will be a quiz over Chapter 22 and the journal article Call Duration as an Indicator of Genetic Quality in Gray Tree Frogs on Wednesday. Pollinate!

2. Chapter 22 Biological Species Concept

3. Speciation is the process by which one species splits into two or more species. Microevolution consists of changes in allele frequency in a population over time. Macroevolution refers to broad patterns of evolutionary change above the species level.

4. (a) Similarity between different species(b) Diversity within a species The Biological Species Concept

5. Reproductive Isolation Reproductive isolation is the existence of biological barriers that impede two species from producing viable, fertile offspring. Reproductive isolation can be classified by whether barriers act before or after fertilization.

6. Figure 22.3a Prezygotic barriers Habitat isolation Temporal isolation Behavioral isolation MATING ATTEMPT (a) (c) (d) (b) (e)

7. Figure 22.3b Prezygotic barriers Mechanical isolation Gametic isolation FERTILIZATION MATING ATTEMPT (f)(g)

8. Figure 22.3c Postzygotic barriers Reduced hybrid viability Reduced hybrid fertility Hybrid breakdown FERTILIZATION VIABLE, FERTILE OFFSPRING (h) (i) (l) (j) (k)

9. Figure 22.3d Prezygotic barriers Habitat isolation Temporal isolation Behavioral isolation MATING ATTEMPT MATING ATTEMPT FERTILIZATION VIABLE, FERTILE OFFSPRING Gametic isolation Mechanical isolation Postzygotic barriers Reduced hybrid viability Reduced hybrid fertility Hybrid breakdown

10. Figure 22.3 Prezygotic barriersPostzygotic barriers Habitat isolation Temporal isolation Behavioral isolation Mechanical isolation Gametic isolation Reduced hybrid viability Reduced hybrid fertility Hybrid breakdown MATING ATTEMPT FERTILI- ZATION VIABLE, FERTILE OFF- SPRING (a)(c)(e)(f)(g)(h)(i)(l) (j) (k) (d) (b)