Select the best response to the question. ?
Several patients come to the emergency department with abdominal pain and diarrhea after eating pasta salad at a family picnic. What type of pathogen transmission has occurred?
A) ?vector
B) ?common vehicle
C) airborne?
D) ?direct contact
B
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A weakly oxidase-positive, nonfermenting gram-negative rod is isolated from respiratory sample. Traditional biochemical reactions include: arginine dihydrolase-negative; lysine decarbox-ylase-positive; gelatin liquefaction-positive; oxidizes lactose and glucose
a. B. cepacia b. B. vesicularis c. P. aeruginosa d. Pandoraea spp.
The cells of the human body can differ in size and shape, and some can even alter their shape. This is an example of cellular diversity.
a. true b. false
Which algal group contains individuals that are typically unicellular and form siliceous shells?
a. diatoms b. red algae c. brown algae d. green algae e. dinoflagellates
Which type of cell junction acts as anchors and distributes tension through a cellular sheet and reduces the chance of tearing when it is subjected to great mechanical stress?
A. tight junctions B. connexons C. gap junctions D. desmosomes