CK-12 Foundation is a non-profit organization with a mission to reduce the cost of textbook materials for the K-12 market both in the U.S. and worldwide. Using an open-source, collaborative, and web-based compilation model, CK-12 pioneers and promotes the creation and distribution of high-quality, adaptive online textbooks that can be mixed, modified and printed (i.e., the FlexBook® textbooks). Copyright © 2023 CK-12 Foundation, www.ck12.org The names “CK-12” and “CK12” and associated logos and the terms “FlexBook®” and “FlexBook Platform®” (collectively “CK-12 Marks”) are trademarks and service marks of CK-12 Foundation and are protected by federal, state, and international laws. Any form of reproduction of this content in any format or medium, in whole or in sections, must be attributed according to our attribution guidelines. https://www.ck12info.org/about/attributionguidelines Except as otherwise noted, all CK-12 Content (including CK-12 Curriculum Material) is made available to Users in accordance with the CK-12 Curriculum Materials License https://www.ck12info.org/curriculummaterials-license Complete terms for use for the CK-12 website can be found at: http://www.ck12info.org/terms-of-use/ Printed: January 2, 2023 1 www. c k 12 .org Theory of evolution Worksheet Visit CK12.org for Free Online Practice 1. Darwin found that the different beaks of Galápagos finches seemed to suit them for different types of food. a. TRUE b. FALSE 2. Darwin spent five years studying and collecting specimens on the voyage of the ____________. a. b. c. d. HMS Beagle HMS Regal HMS Seagle HMS Finch 3. The Galápagos Islands are located off the west coast of __________. a. b. c. d. Africa North America Europe South America 4. Darwin's famous book was first published in ________. a. b. c. d. 1659 1959 1859 1759 5. The only force of evolution that Darwin identified was ___________. a. b. c. d. gene flow genetic drift natural selection mutation 2 www. c k 12 .org 6. Darwin published his theory of evolution in a book titled On the Origin of Species. a. TRUE b. FALSE 7. Evolution means change. a. TRUE b. FALSE 8. Darwin's famous book on evolution is called _______________. a. b. c. d. "On Population" On the Origin of Species The Extended Phenotype Principles of Geology 9. Darwin never observed fossils, so they had no influence on his theory of evolution. a. TRUE b. FALSE 10. Galápagos Islanders could tell which island a giant tortoise came from based on the ________. a. b. c. d. habitat diet shell shape beak size 3 www. c k 12 .org Answer Keys 1. TRUE 2. HMS Beagle 3. South America 4. 1859 5. natural selection 6. TRUE 7. TRUE 8. On the Origin of Species 9. FALSE 10. shell shape 4