Concept explainers
Which of the following experiments could test the hypothesis that bacteria cause ulcers in humans? (Assume each experiment includes a control group.) Explain what evidence would be provided by the results of the experiment.
a. Identify the microbes found in the stomachs of ulcer patients.
b. Treat a group of ulcer patients with antibiotics.
c. Place a group of ulcer patients on a strict low-acid diet.
d. Obtain stomach fluid from ulcer patents and feed it to mice.
Want to see the full answer?
Check out a sample textbook solutionChapter 16 Solutions
Campbell Biology Concepts & Connections Second Custom Edition For Tacoma Community College
Additional Science Textbook Solutions
Campbell Biology in Focus (2nd Edition)
Becker's World of the Cell (9th Edition)
Campbell Essential Biology with Physiology (5th Edition)
Biology: Life on Earth with Physiology (11th Edition)
Genetic Analysis: An Integrated Approach (2nd Edition)
Human Anatomy & Physiology (11th Edition)
- Describe the lines of proof Robert Koch used to definitivelyassociate the bacterium Mycobacterium tuberculosis with thedisease tuberculosis. How would his proof have been flawedif any of the tools he developed for studying bacterialdiseases had not been available for his study of tuberculosis?arrow_forwardErwin Chargaff did not have any DNA samples from thermoacidophilic bacteria such as those that thrive in the geothermal (hot) springs of Yellowstone Park. Such bacteria had not been isolated in 1951 when Chargaff reported his results. If he had obtained such a sample, what do you think its relative G-C content might have been? Why?arrow_forwardIn Kornberg’s initial experiments, it was rumored that he grew E. coli in Anheuser-Busch beer vats. (Kornberg was working at Washington University in St. Louis.) Why do you think this might have been helpful to the experiment?arrow_forward
- Which of the following is not part of Koch’s Postulates? a. A specific microorganism must be present in a disease b. The organism must be isolated into pure culture c. Living organisms spring forth from non-living materials d. All of the choices are part of Koch’s Postulatesarrow_forwardIn a series of infection experiments, a researcher discovers that the ID50 value for the infectious bacterium Parasiticum mucoides is 2,000, and that the ID50 for another infectious bacterium, Donoteatum thisbacterium, is 150. Given these data, a person exposed to 1,000 bacteria of each type would be more likely to be infected by which bacterium? There is no way to know given the information provided Both infections are equally likely Donoteatum thisbacterium Parasiticum mucoidesarrow_forwardWhy was Van Leeuwenhoek's discovery of the unknown such a milestone achievement for the progress in microbiology? Why do you think there were not too many other discoveries for some time after?arrow_forward
- The beaches at a nearby lake have been closed because of high E. coli counts. The lake is surrounded by agricultural areas and summer cottages. We know that different species of vertebrates have different E. coli strains in their digestive tracts. Propose a hypothesis about the source of the E. coli and design an experiment to test this hypothesis.arrow_forwardBriefly summarize Dr. Barry Marshall’s experiment that showed that stress, spicy foods, and excess stomach acid were not the main causes of stomach ulcers, rather, was caused by bacteria. Include the name of this bacterial species in your essay?arrow_forwardOverall, how would you evaluate the role of GMO’s and Nanotechnology in the current society? In the current advancement of technology and with the introduction of different phones and computers we utilize in our distance learning, would you prefer implement Nanotechnology here in the Philippines?arrow_forward
- Please explain the significance and implications of the "Vernadsky Paradox" from a microbial perspective.arrow_forwardIf you were working with Drs. Joseph Warren and Barry J. Marshall to design a study to determine whether the bacteria caused ulcers, how would you do it?arrow_forwardIn a series of infection experiments, a researcher discovers that the ID50 value for the infectious bacterium Parasiticum mucoides is 100, and that the ID50 for another infectious bacterium, Donoteatum thisbacterium, is 15,000. Given these data, a person exposed to 1,000 bacteria of each type would be more likely to be infected by which bacterium? Group of answer choices There is no way to know given the information provided Both infections are equally likely Parasiticum mucoides Donoteatum thisbacteriumarrow_forward
- Human Anatomy & Physiology (11th Edition)BiologyISBN:9780134580999Author:Elaine N. Marieb, Katja N. HoehnPublisher:PEARSONBiology 2eBiologyISBN:9781947172517Author:Matthew Douglas, Jung Choi, Mary Ann ClarkPublisher:OpenStaxAnatomy & PhysiologyBiologyISBN:9781259398629Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa StouterPublisher:Mcgraw Hill Education,
- Molecular Biology of the Cell (Sixth Edition)BiologyISBN:9780815344322Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter WalterPublisher:W. W. Norton & CompanyLaboratory Manual For Human Anatomy & PhysiologyBiologyISBN:9781260159363Author:Martin, Terry R., Prentice-craver, CynthiaPublisher:McGraw-Hill Publishing Co.Inquiry Into Life (16th Edition)BiologyISBN:9781260231700Author:Sylvia S. Mader, Michael WindelspechtPublisher:McGraw Hill Education