When salt dissolves in water, the water molecules form ____ around the Na+ and Cl- ions
a. covalent bonds
b. hydration layers
c. nonpolar interactions
d. membranes
e. ionic bonds
ANSWER: b
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The hydrogen-bond lattice causes water to have an unusually ____ specific heat, an unusually ____ heat of
vaporization and an unusually ____ density in solid form.
a. high; high; high b. low; low; low c. high; low; high d. high; high; low e. low; low; high
Which of the following is a Gram-negative bacterium that acts as a predator on other Gram-negative bacteria, and might be used to control populations of Gram-negative human pathogens in locations such as poultry farms?
A. Salmonella enteritidis B. Vibrio choerae C. Bdellovibrio D. E. coli
The ratio of a medication's dose that can be tolerated to its effective dose is the therapeutic (MIC/index/range) of the medication
What will be an ideal response?
During unfavorable growth conditions, many protozoa can convert to a resistant, dormant stage called a ________.
Fill in the blank(s) with the appropriate word(s).