Which of the following is NOT a way medical professionals can combat and delay the evolution of antibiotic resistance bacteria?
A. Combining certain drugs safely to treat infections
B. Encouraging patients to take mild doses of antibiotics for small or chronic illness over longer periods of time
C. Encourage patients to take the entire regiment of their antibiotic prescription, not just until they feel better
D. Cutting back on preventative antibiotic treatments in food stores such as crops and livestock
E. Using antibiotics to treat only bacterial infections, not viral infections
Ans: B. Encouraging patients to take mild doses of antibiotics for small or chronic illness over longer periods of time
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Gurdon's nuclear transplantation experiments with clawed toads supported the hypothesis that:
A. differentiation is the result of genes being successively deleted from the genome. B. differentiation is the result of genes being successively turned off. C. differentiation causes cells to become pluripotent. D. only nuclei from the blastocyst retain sufficient potency to produce an adult organism. E. All of these choices are correct.
A phylogenetic tree is:
A. a diagram of the genetics of trees. B. a diagram of the evolutionary relationships among groups of trees. C. a diagram of the evolutionary relationships of a species. D. a diagram of the genetics of a species.
Which of the following are true statements regarding
the use of DNA in evolutionary comparisons? a. Lineages have a mixture of ancestral and novel characters. b. Mutations inevitably change those sequences over time. c. Mutations occur randomly. d. Most mutations are neutral. e. All of these are true.
Which list correctly orders the events leading to leaf fall in deciduous trees?
A) formation of abscission layer, increase in ethylene levels, decrease in auxin levels B) shortening days, increase in ethylene production, formation of abscission layer C) shortening days, formation of abscission layer, decrease in ethylene levels D) decrease in ethylene levels, shortening days, formation of abscission layer