1. © 2010 Pearson Education, Inc. Clicker Questions for use with Classroom Response Systems Campbell Essential Biology, Fourth Edition – Simon, Reece, and Dickey Campbell Essential Biology with Physiology, Third Edition – Simon, Reece, and Dickey Questions prepared by Brad Williamson, updated by Mike Tveten How Biological Diversity Evolves Chapter 14

2. © 2010 Pearson Education, Inc. Concept Check Which of the following defines a species? a.a population of organisms that can breed together and produce fertile offspring b.organisms that share observable and measurable phenotypic traits c.organisms that share a common and unique genetic history d.organisms that share common and unique adaptations to fit specific roles in an ecological community e.all of the above define a species, depending on the specific question

3. © 2010 Pearson Education, Inc. Concept Check These two meadowlarks are two separate species, the eastern (Sturnella magna) and the western (Sturnella neglecta). Although they look very similar and have similar habitats, they are considered different species because a.the two do not normally interbreed. b.their ranges do not overlap. c.they have different songs. d.they do not share the same habitat.

4. © 2010 Pearson Education, Inc. Concept Check There are several other species pairs like these meadowlarks in the Great Plains (orioles, chickadees, yellow-rumped warblers, and flickers). Some are considered separate species and others aren’t, even though they are quite different in physical appearance. Which of the following might have geologically isolated these different bird populations, leading to speciation? a.the Mississippi River b.recent (geologically) continental glaciation c.prairie fires in the spring d.hurricanes from the Gulf of Mexico

5. © 2010 Pearson Education, Inc. Concept Check The timeline at the bottom of the screen represents the history of life on Earth. Which of the marked periods represents the beginning of photosynthesis and the accumulation of oxygen in the atmosphere? a.A b.B c.C d.D Present Earliest evidence of life A. B. C. D.

6. © 2010 Pearson Education, Inc. Concept Check The timeline at the bottom of the screen represents the history of life on Earth. Which of the marked periods represents the oldest fossil eukaryotes? a.A b.B c.C d.D Present Earliest evidence of life A. B. C. D.

7. © 2010 Pearson Education, Inc. Concept Check The timeline at the bottom of the screen represents the history of life on Earth. Which of the marked periods represents the Cambrian explosion? a.A b.B c.C d.D Present Earliest evidence of life A. B. C. D.

8. © 2010 Pearson Education, Inc. Concept Check The timeline at the bottom of the screen represents the history of life on Earth. Which of the marked periods represents the extinction of the dinosaurs? a.A b.B c.C d.D Present Earliest evidence of life A. B. C. D.

9. © 2010 Pearson Education, Inc. Concept Check This cladogram represents an imaginary group of organisms—A, B, C, D, and E. A common ancestor for species C and E would be at which position number? a.1 b.2 c.3 d.4 1. 2. 3. 4.

10. © 2010 Pearson Education, Inc. Concept Check This cladogram represents an imaginary group of organisms—A, B, C, D, and E. Which two living species are the most closely related? a.A and B b.B and C c.C and D d.A and D 1. 2. 3. 4. time present relatedness