dinosaurChap 17-4 Reading: Patterns of Evolution

1. What is macroevolution? ____________________________________________________________
2. What percent of species that have ever lived are now extinct? _____
3. Why did the dinosaurs become extinct (leading hypothesis) ____________________________________________________________
4. The disappearance of so many species left ______________________ open and provided ecological opportunities for those organisms that _____________________________________________
5. The extinction of dinosaurs cleared the way for the evolution of modern _____________________ and _____________________________
6. What evolutionary concept explains how a dozen finches evolved from a single species? ________________________________________

7. What kind of mammals existed at the same time dinosaurs "ruled the earth"? ___________________
8. Adaptive radiation can produce _____________________ organisms that look similar to one another.
This process is called __________________________ evolution.
9. Structures that look and function similarly but are made of parts that do not share a common evolutionary history are called ______________________________ structures.
10. What two animals (given in the book as examples) look amazingly similar but are not closely related?
11. The process by which two species evolve in response to changes in each other is called
12. What type of insect could reach the nectar of the orchid with the long spur? _______________
13. Why did plants develop poisonous compounds? ____________________________________
14. Gradualism is the idea that evolution occurred [ slowly | quickly ] over a long period.

15. Name a species that has changed very little since they first appeared in the fossil record:
16. What can cause rapid evolution? _________________________________________________
17. Some groups evolve rapidly following mass ________________________________________
18. What is punctuated equilibrium? ___________________________________________________
19. Master control genes, or _________ genes guide the development of major body _______________
20. If you turn on the "wingless" gene, what happens to the insect? _________________________

Analyzing Data (p 438)

1. What happened to the number of families at the end of the Paleozoic Era? [ increased / decreased ]
2. What might have caused this change? ________________________________________
3. What happened to the number of species during the Mesozoic and Cenozoic eras? [ increased / decreased ]
4. What evolutionary concept would explain this change?
a. convergent evolution b. coevolution c. adaptive radiation d. natural selection