1. Click to edit Master title style Click to edit Master subtitle style CLICKER QUESTIONS For CAMPBELL BIOLOGY, NINTH EDITION Jane B. Reece, Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Robert B. Jackson © 2011 Pearson Education, Inc. Bacteria and Archaea Chapter 27 Questions prepared by William Wischusen Louisiana State University Michael Dini Texas Tech University

2. © 2011 Pearson Education, Inc. Prokaryotes lack the nucleus found in eukaryotic cells. As a result, prokaryotic cells do not contain which of the following? a)a nuclear membrane b)DNA c)one or more chromosomes d)all of the above

3. © 2011 Pearson Education, Inc. Which of the following statements best describes most bacteria? a)They are generally harmful. b)They are limited to living in a few habitats. c)They are very common in the environment. d)They are responsible for the “common cold.”

4. © 2011 Pearson Education, Inc. Which features of bacteria can be considered to be defensive structures?

5. © 2011 Pearson Education, Inc. What are the features of prokaryotes that enable them to adapt so quickly?

6. © 2011 Pearson Education, Inc. Which of these is LEAST associated with prokaryotes engaged together in metabolic cooperation? a)Mutualism b)Biofilms c)Symbiosis d)Commensalism

7. © 2011 Pearson Education, Inc. What is true of archaeans? a)They are the cause of many human diseases. b)Structurally, they represent an intermediate form between bacteria cells and eukaryotic cells. c)They are extremophiles. d)They have undergone horizontal gene transfer with bacteria and with eukaryotes. e)They include Earth’s first aerobic photosynthesizers.

8. © 2011 Pearson Education, Inc. Cyanobacteria that can perform nitrogen fixation a)use this metabolic pathway to provide themselves with glucose. b)cannot also perform aerobic photosynthesis. c)provide both fixed nitrogen and fixed carbon dioxide to other organisms. d)do so on membranes called thylakoids. e)are part of the community of organisms at deep- sea vents.

9. © 2011 Pearson Education, Inc. A bacterium that contains both R plasmids and F plasmids a)can transfer antibiotic resistance genes to other bacteria via conjugation. b)must be pathogenic. c)therefore has the ability to make and spread restriction enzymes to counter phage attacks. d)is, therefore, an Hfr cell. e)can undergo genetic recombination only by performing conjugation.