The O/F Glucose medium is to determine all of the following characteristics of a bacterium EXCEPT
A. Whether the bacterium is a Gram-positive or a Gram-negative
B. Whether the bacterium is a sacchrolytic or asacchrolytic
C. Whether the bacterium utilized the oxidative or fermentative pathway in glycolysis
D. Whether the bacterium is an obligate aerobe or a facultative anaerobe
Ans: A. Whether the bacterium is a Gram-positive or a Gram-negative
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A patient visits a doctor complaining of a stomach infection. The patient insists that he be prescribed enough antibiotics to kill all of the bacteria in his intestines. Why is this a bad idea? (Select all correct choices.)
A. It's notâ€"any bacteria in his intestines will cause the patient to be sick. B. Such an antibiotic treatment could result in a serious C. difficile infection. C. Many intestinal bacteria are beneficial (they provide vitamins or break down cellulose).
Some people say that China’s number one export is air pollution. This is because
a. large countries have a higher population, and therefore, more cars and machinery to produce pollutants. b. many countries do not have monitored emission standards. c. wind patterns bring smog from China to the West Coast of the United States. d. all of these
The most parsimonious inference about the evolution of parental care behavior in crocodilians and
birds is
a. it evolved once in the common ancestor of the two groups. d. it is a learned behavior. b. the derived character state is an apomorphy. e. parental care arose due to coevolution. c. it evolved numerous times within each lineage.
Which of the following human extraembryonic
membranes forms the urinary bladder? a. amnion b. yolk sac c. chorion d. allantois e. none of these