In their basic body plan, mollusks have a visceral mass covered with a soft epithelium and a muscular ____ that is used in locomotion.
Fill in the blank(s) with the appropriate word(s).
Foot or
foot
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The host range of a virus is
A.the geographical location in which the virus is found. B.limited by availability of its needed nutritional resources. C.always limited to one species. D. the type of organisms or cells that a virus can infect. E. the boundaries of the ecosystem in which it is found.
The benthic community of an ocean, with the exception of hydrothermal vents, is best described as
A) completely heterotrophic and very diverse. B) completely autotrophic and very diverse. C) completely phototrophic and not very diverse. D) mostly heterotrophic and not very diverse.
Which of the following is not made of keratin?
A. fingernails B. claws C. hair D. antlers E. hooves
In the lab, the urine specimen is spread on an agar plate with antibiotic discs placed to determine antimicrobial susceptibility. Following incubation, the clear area around each disc is measured. What term describes the observed area of antimicrobial action around each disc?
A. zone of inhibition B. zone of susceptibility C. zone of resistance D. antibiogram