Which of the following taxonomic levels is most inclusive?
A) order
B) genus
C) family
D) class
D
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A young boy has DMD. What do you know about his parents?
a. Both of his parents are carriers of DMD. b. At least one of his parents is a carrier of DMD. c. His mother is a carrier of DMD. d. His father is a carrier of DMD.
A ____ causes the blood vessels of the skin to relax and increase in diameter
a. decrease in body temperature b. increase in body temperature c. electrical stimulus d. mechanical stimulus e. chemical stimulus
If the bacterium Staphylococcus aureus experiences a cost for maintaining one or more antibiotic-resistance genes, then what should happen in environments from which antibiotics are missing?
A. These genes should continue to be maintained in case the antibiotics ever appear. B. These bacteria should be outcompeted and replaced by bacteria that have lost these genes. C. The bacteria should start making and secreting their own antibiotics. D. The bacteria should try to make the cost worthwhile by locating, and migrating to, microenvironments where traces of antibiotics are present.
What determines the specific segment of DNA that is amplified by PCR?
A) the plasmid used B) the type of DNA polymerase C) the use of DNA ligase D) the source of nucleotides E) the primers used