T or F: most muscles contain only one type of muscle fiber
What will be an ideal response?
False
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The organisms that cause pneumococcal pneumonia are rarely found as a part of the normal flora of healthy adults
Indicate whether the statement is true or false.
After exposure to Agrobacterium tumefaciens bacteria containing both a recombinant T-DNA vector and a helper plasmid, new plants can be grown from single cells in the presence of herbicide. Without the herbicide,
A) neither transformed nor nontransformed cells would survive. B) only nontransformed plants would grow. C) only cells with the helper plasmid would grow. D) both transformed and nontransformed plants would grow.
Which is not a component of the scientific method?
A. Careful observation. B. The construction and testing of hypotheses. C. Openness to new information and ideas. D. Submitting the result of your work for review by others only when you have won the Nobel Prize.
Humans become infected with Toxoplasma gondii primarily by
A) being bitten by a tick. B) direct skin penetration. C) ingesting food or water contaminated with cysts. D) ingesting meat containing the parasite. E) intimate contact with another person.