1. What is a species? A species is often defined as the largest group of organisms 2. Can 2 different species breed and have offspring?
3. What is speciation and how does it occur?
4. What are two main types of speciation?
5. What is the main difference between allopatric and sympatric speciation?
6. What is causing sympatric speciation? (2 barriers shown)

7. What are the 3 examples of prezygotic barriers mentioned?
8. What are the 3 examples of postzygotic barriers mentioned?