Biology Module #2 Test (2nd Edition)

Enter Your Name   Enter your E-mail Address:  01a. Define Logistic growth. 01b. Define Plasmid. 01c. Define Endospore. 02. Identify the structure marked 1 in the figure above. 03. Identify the structure marked 2 in the figure above. 04. Identify the structure marked 3 in the figure above. 05. Identify the structure marked 4 in the figure above. 06. A bacterium suddenly cannot manufacture proteins. What component(s) of the cell is (are) not working? 07. If a bacterium is anaerobic, would you expect to find it floating at the top of a lake or deep in the muck at the bottom of the lake? 08. A bacterium is photosynthetic. Is it a decomposer? 09. A bacterium receives a new trait that it did not previously have. However, it did not participate in conjugation. How is this possible? 10. What bacterial process does the following schematic represent? 11. If a sample of food is dehydrated, what condition for bacterial growth are you removing from the food? 12. If a population of bacteria is in steady-state, does that mean no bacteria are dying? 13. What shape is a bacterium from the genus Streptobacillus. 14. A population of bacteria are very sensitive to light. They live in a lake that is in a cave, so they flourish. Slowly, however, a hole begins to erode in the cave's roof. As the days pass, light begins to filter in and the cave starts to be dimly lit. The bacteria begin to die. While the erosion is taking place, however, two individual bacteria in the soil above ground fall into the lake. These bacteria cannot survive in the dimness of the poorly-lit cave, so they die immediately. Days later, the hole has opened up so that light floods the cavern. Nevertheless, the bacteria that were once dying are flourishing, with a population larger than they ever had before the erosion. Explain how this could have happened. 15. A bacterium is Gram-negative and needs light to survive. It lives in a habitat that is completely oxygen-free. To what phylum and class does it belong? 16. A Staphylococcus bacterium is Gram-positive and lives in an oxygen-free habitat. To what phylum and class does it belong?