1. Name two limitations of fossil records

1. Adaptive radiation is characterized by two important processes. What are they?
2. Causes of the Cambrian explosion
3. Mass extinction and Background extinction
4. Name two animals that became extinct via background extinction
5. Explain the origin of mitochondria
6. What is the main difference between prokaryotes and eukaryotes?
7. At the end of Meiosis I, how many cells are produced and what is their ploidy?