The subjective evidence of disease sensed by the patient is termed a/an ________.
A. sign
B. syndrome
C. symptom
D. inflammation
E. pathology
Answer: C
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Chemotaxis refers to the ability of a cell to
A. move in response to a chemical. B. move in response to light. C. transport desired molecules into a cell. D. halt movement in response to a chemical.
A person with sickle-cell trait has ________ at the ?-globin locus
A) two wild-type alleles B) two mutant alleles C) one wild-type and one mutant allele D) one wild-type and one deleted allele E) one mutant and one deleted allele
Sodium chloride is composed of molecules that are stable when dry. In the presence of water, however, the atoms of the molecules separate from each other. What type of chemical bond holds the dry substance together?
A) hydrogen bonds B) ionic bonds C) nonpolar covalent bonds D) polar covalent bonds
Why do coastal areas have milder, less variable climates than inland areas?
A) Large bodies of water have high salt concentrations, and salt absorbs a large proportion of the light energy that would have warmed the land. B) Coastal areas are concentrated near the equator, which varies less than other parts of the globe in the angle at which the sun's light hits it. C) Because water is a good solvent, it is able to dissolve the photons in light, reducing their ability to heat or cool the land. D) Large bodies of water, especially oceans, can absorb huge amounts of heat from the sun during warm times of the year, reducing temperature increases on the land. Similarly, during cold times of year the ocean slowly cools, giving off heat that reduces the temperature drop on shore. E) There is no known reason why coastal areas have milder, less variable climates than inland areas.