Copyright

Campbell Biology Chapter 25: The History of Life on Earth Chapter Exam

Exam Instructions:

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

Page 1

Question 1 1. What characterizes a synapsid?

Question 2 2. Roughly when did mammals first evolve from cynodonts?

Question 3 3. When an animal or plant is trapped under a rock or within lava and preserved to be dug up later, the remains are called a(n):

Question 4 4. What is the name of the eon we currently live in?

Question 5 5. What are the plates of the Earth's crust?

Page 2

Question 6 6. What was the main discovery when people began mapping the ocean floor after World War II?

Question 7 7. To state an organism is 'extinct' means

Question 8 8. When scientists found identical patterns on either side of the mid-ocean ridge, what did they deduce?

Question 9 9. Which of the following is an example of a background extinction event?

Question 10 10. What group evolved from the pelycosaurs?

Page 3

Question 11 11. Small, non-living droplets that can regulate their internal environments are best known as _____

Question 12 12. When plates that are higher at the spreading center flow downhill and eventually flatten out to the ocean floor, we call that _____.

Question 13 13. What method is used to determine the specific age of a rock or fossil?

Question 14 14. What is the purpose of the device shown?

Question 15 15. What are the three eras of the Phanerozoic eon?

Page 4

Question 16 16. When did mammalian evolution really explode in diversity and size?

Question 17 17. Which answer choice correctly orders the three major eons of Earth's history, from the oldest to the most recent?

Question 18 18. Convection is:

Question 19 19. Which of the following is NOT a reason that the number of species extinctions has increased so dramatically over the past millennium?

Question 20 20. The time period in Earth's history that saw the greatest increase in both the number and diversity of species is the:

Page 5

Question 21 21. What was one of the early synapsids?

Question 22 22. What type of event separates the Paleozoic, Mesozoic, and Cenozoic eras from one another in the Phanerozoic eon?

Question 23 23. When was the most recent mass extinction event?

Question 24 24. Which of the following is true about the Archaean eon?

Question 25 25. What discovery was NOT made from mapping the ocean floor?

Page 6

Question 26 26. Scientists agree that Earth is about how old?

Question 27 27. Which of the following is NOT TRUE about background extinction?

Question 28 28. Using an apple as a model of the earth, the peel, fruit, and core represent, in order:

Question 29 29. The Archean and Proterozoic eons are grouped together as the:

Question 30 30. What scientist is credited with the idea that early life on Earth formed through a series of reactions that made simple compounds gradually more complex?

Campbell Biology Chapter 25: The History of Life on Earth Chapter Exam Instructions

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

Campbell Biology: Online Textbook Help  /  Science Courses
Support