Symptoms of a common cold, such as runny nose and sore throat, most directly result from
a. attachment of virus particles to the mucosa of the upper respiratory tract.
b. cell death in the lining of the nose and throat.
c. the body's attempts to defend against the infection.
d. general stress and social isolation brought about by having an infection.
e. psychological conditioning based on previous infections.
C; Most direct symptoms of viral illnesses, including the generally achy, crummy feeling, result from the inflammatory response, not from direct actions of the virus. It may be easier to catch viral infections when you are stressed and lonely (choice d), but these conditions do not directly produce cold symptoms.
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Deoxyribose is
(a) a five-carbon sugar. (b) present in RNA. (c) a nitrogen-containing base. (d) one type of purine.
Prolactin
a. stimulates the mammary glands to produce milk. b. affects only animals with mammary glands. c. causes the development of breasts and other secondary sexual characteristics in the male. d. acts in concert with FSH to produce milk. e. has secondary effects on reducing the size of the uterus after birth
Chromatids are
a. attached at the centriole. b. a pair of chromosomes, one from the mother and one from the father. c. attached at their centromeres. d. identical until crossing over occurs. e. attached at their centromeres and are identical until crossing over occurs.
A heritability value of 0.6 for IQ indicates that 60 percent of a person's IQ results from genetic
influence. Indicate whether the statement is true or false.