Mild, uncomplicated cases of pseudomembranous colitis may be treated by
A. debridement.
B. wound cleansing.
C. vancomycin for several weeks.
D. withdrawal of antibiotics and replacement of lost fluids and electrolytes.
E. All of the choices are correct.
Answer: D. withdrawal of antibiotics and replacement of lost fluids and electrolytes.
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Which of the following are true statements about gibberellins? Check all that apply.
_____ They can restore normal growth and development in certain dwarf mutants. _____ They inhibit amylase and other hydrolytic enzymes. _____ They are produced in the apical regions of shoots and roots. _____ They promote internode elongation. _____ They hasten seed germination.
Answer the following statements true (T) or false (F)
1. Capillary electrophoresis is a technique used to separate DNA pieces. 2. Familial DNA search was used in the case of California's "Grim Sleeper." 3. In a familial DNA search, DNA from a crime scene is compared to DNA in databases from convicted felons, and if nearly half the CODIS sites match, a first-degree relative of the convict becomes a suspect. 4. DNA on a glove left at the crime scene is an example of primary DNA transfer. 5. Familial DNA searches are controversial since innocent people may be accused based on sharing CODIS markers with convicted felons.
What substance would you expect to accumulate in soil as a result of increased acid precipitation?
A. Nitrogen B. Oxygen C. Ammonia D. Calcium
On the back of your skull you can feel a small bump, below which is an opening where the spinal cord enters the skull. The location of this opening toward the bottom of the skull is significant in evolutionary biology for what reason?
A) It allowed for the hominin brain to grow much larger than other primates. B) It provided greater protection for the spinal cord. C) It occurred as a result of the change to a bipedal stance. D) This change was necessary for the increase in size from prosimian forms to anthropoid forms.