Predict a situation would be the most likely and most direct result when all the bacteria on Earth suddenly disappeared. A. There would be no more pathogens on Earth. B. The number of organisms on Earth would decrease by 10-20%. C. The recycling of nutrients would be greatly reduced, at least initially. D. Human populations would thrive in the absence of disease.

Predict a situation would be the most likely and most direct result when all the bacteria on Earth suddenly disappeared. A. There would be no more pathogens on Earth. B. The number of organisms on Earth would decrease by 10-20%. C. The recycling of nutrients would be greatly reduced, at least initially. D. Human populations would thrive in the absence of disease.

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter43: The Biosphere

Section: Chapter Questions

Problem 3CT

See similar textbooks

Similar questions

Which of the following factors is a unique event in the evolution of the niche of microbes? A. Variable surrounding conditions B. High mutation rates C. Transfer of DNA D. Selection among microbial populations
An infectious dose of several million cells in enteric infections seems like a lot. a. In terms of the size and abundance of microbes, could you see a cluster containing that many cells with the naked eye? b. About how long would it take an average bacterial species to reach the infectious dose of a million cells starting from a single cell? c. Why do enteric diseases require a relatively higher infectious dose than nonenteric diseases? d. Explain why antimicrobic therapy used on gram-negative bacterial infections could actually lead to illness rather than cure it
Which of the following statements DOES NOT describe nitrogen fixing bacteria? A. Can be found only as a symbiotes associated with the root nodules of legumes. B. Maybe be present in soil. C. Converts atmospheric nitrogen to organic nitrogen. D. Composed of many species of bacteria.
Please answer both part
Which of these statements is true? a. An antibiotic is any substance produced by a organism that is antagonistic to the growth of prokaryotes. b. An antibiotic is any substance produced by a prokaryote that is antagonistic to the growth of other viruses. c. An antibiotic is any substance produced by a prokaryote that is antagonistic to the growth of eukaryotic cells. d. An antibiotic is any substance produced by a prokaryote that prevents growth of the same prokaryote.
If all prokaryotes on Earth suddenly vanished, which of the following would be the most likely and most direct result? O a. There would be no more pathogens on Earth. O b. Human populations would thrive in the absence of disease. O c. Bacteriophage numbers would dramatically increase. Od. The recycling of nutrients would be greatly reduced, at least initially. Next page
In patients with nonresistant strains of the tuberculosis bacterium, antibiotics can relieve symptoms in a few weeks. However, it takes much longer to halt the infection, and patients may discontinue treatment while bacteria are still present. Explain how this could result in the evolution of drug-resistant pathogens.
Which statement is NOT a concept in microbes present in animals? A. Each individual animal has its unique set of microbial flora. B. There are normal microbial flora present in key parts of an animal. C. Personal hygiene and decontamination can remove all microbes in an animal. D. Some microbes are incidental and transient.
Probiotic bacteria in the human large intestine (also known as “the colon”): a. have an optimal population growth rate (population doubling time) b. digest food materials, such as dietary fiber (cellulose) that the human digestive system cannot digest c. produce substances that inhibit the growth of detrimental bacteria d. include the lactic acid bacteria Lactobacillus acidophilus and Bifidobacterium bifidum e. produce anti-inflammatory compounds such as short-chain fatty acids
What is the relationship between normal flora Escherichia coli (E. coli) and STEC? A When normal flora E.coli divide in two, they sometimes turn into STEC. B Everyone is colonized by STEC but only some people have non-STEC microbes in the large intestine. C Normal flora E.coli do not make Shiga toxin, but STEC are E. coli that do make Shiga toxin.
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 Postulates
which of the following definitions is not technically correct? a. broad spectrum - effective against many different types of microbes b. bacteriostatic - prevents microbes from growing c. antibiotic - microbial or synthetic product that kills or inhibits growth of microbes. d. all of the above are correct