Although endotoxemia affects many organs, the organ most seriously and irreversibly affected is the
A. heart.
B. lung.
C. kidney.
D. spleen.
B.
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Sporadic cancers ____
a. may develop when proto-oncogenes mutate to form tumor suppressor genes b. may develop when tumor suppressor genes are over-expressed c. are caused by benign tumors d. are cancers that are not inherited e. are less frequent than familial cancers
What is the most likely reason why Reston ebolavirus does not cause human disease?
A. Human tissues lack the appropriate receptors for this viral strain. B. Human interferons prevent the establishment of infection with this viral. C. The human body temperature prohibits viral replication. D. Humans have antibodies that prevent establishment of infection with this viral strain.
In the figure above, diagram 1 represents
a. a molecule of chlorophyll. b. a phospholipid in the thylakoid membrane. c. a primary electron acceptor. d. an accessory pigment. e. a carotenoid.
What key conclusion did Riesch and Schlupp draw from the life history data of the Atlantic mollies?
A. More energy is invested in producing larger offspring when the populations live in environmentally stressful habitats. B. The populations exposed to H2S are able to use the toxic molecule for metabolic energy. C. Genetic regulation in the species results in production of equal sizes of offspring whether exposed to stressful environments or not. D. More energy is invested in producing many more offspring when the populations live in environmentally stressful habitats. E. The populations are only able to survive and reproduce when in stressful environments of either darkness or H2S.