When does a CAM plant take in atmospheric CO2?
a. daytime only
b. nighttime only
c. summer only
d. winter only
e. anytime the Calvin cycle is occurring
ANSWER: b
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A direct immunofluorescence test involves a(n)
A. known antibody binding to an unknown antigen. B. lysis reaction. C. agglutination reaction. D. precipitation reaction.
Siamese cats have enzymes that code for dark
fur color but are only active in cooler temperatures. Thus, the tips of a Siamese cat’s ears, feet, and tail are dark but not the warmer regions of its body core. This is an example of
a. pleiotropy. b. environmental effects. c. epistasis. d. incomplete dominance. e. co-dominance
Greenhouse gases act primarily to ____
a. warm Earth's surface b. cool the atmosphere c. block out ultraviolet radiation d. contribute to acid rain e. increase carbon monoxide concentrations
__________ is an approach that tries to get the immune system more involved in the fight against cancer.
a) immunotherapy b) inhibition of cancer-promoting proteins c) hyposensitization d) inhibition of angiogensis e) gene therapy