Resident biota of the gastrointestinal tract include ________.
A. Bacteroides
B. Streptococcus
C. Lactobacillus
D. Haemophilus
E. All of the choices are correct.
Answer: E
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Carrying capacity is _____
A) seldom reached by marine producers and consumers because of the vast resources of the ocean B) the maximum population size that a particular environment can support C) fixed for most species over most of their range most of the time D) determined by density and dispersion data E) the term used to describe the stress a population undergoes due to limited resources
In your microbiology lab, your class is identifying bacteria. You are using dichotomous keys to aid in the identification process using the data from a variety of biochemical tests. What problems do you foresee in this procedure?
A. If you misread a biochemical test or write down the wrong result, the key will likely take you to an alternative organism that is not your unknown bacterium. B. Dichotomous keys are too sophisticated to read properly, so you are worried that there will be a large degree of error in your identification. C. The dichotomous key does not contain information on your bacterium. D. Dichotomous keys are not valid for identification.
When would gas sterilization be most useful?
a. sterilizing bulky heat sensitive items, like mattresses b. sterilizing a bottle of nutrient broth for microbiology lab c. cleaning a patients skin in preparation for surgery d. sterilizing heat sensitive antibiotics
TranSTR analysis is a DNA profiling technique that makes use of the fact that different people have different numbers of repeats of short DNA sequences at certain sites in the genomeslation converts the information stored in __DNA______ to ___RNA_____.
a. true b. false