Select the statement that explains the usefulness of metagenomic analysis in research today.
A. It detects the abundance of microorganisms in an environment.
B. It evaluates microbial diversity in a habitat.
C. It allows the identification of unculturable microorganisms.
D. All of these are correct statements.
Answer: D
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A microbiologist suspects a strain of Staphylococcus aureus is resistant to methicillin. What would be the best approach to test this suspicion?
A. Perform a Gram stain. B. Sequence the chromosome looking for resistance genes. C. Calculate the doubling time for the bacteria. D. Inject the bacteria into a host animal and look for disease symptoms. E. Add methicillin to the growth plates. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you already know about antibiotic resistance? How does it relate to the question? · What other information is related to the question? Which information is most useful? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
If all the offspring of a cross had the genotype
AaBb, the parents of the cross would most likely be
a. AABB ? aabb. b. AAbb ? aaBB. c. AaBb ? AaBb. d. Aabb ? aaBb. e. AABB ? aabb or AAbb ? aaBB
Repressor Ex. 1: Tetracycline Resistance
What will be an ideal response?
Which of the following is required for natural selection to occur in a population?
A. accumulation of adaptive traits B. differential reproduction C. heritable variation D. All of the choices are correct.