A patient arrives at a hospital suffering from serious difficulty breathing and shortness of breath. Initial tests indicate none of the standard respiratory infectious agents are present. The physician suspects an immune disorder. What clinical indicators would distinguish between asthma, pneumonitis and Pneumocystis pneumonia?
What will be an ideal response?
Asthma would produce high levels of histamines and leukotrienes, resulting in production of excess mucus in the trachea and bronchi and constriction of the bronchi. High antibody titers and low levels of complement proteins along with generalized inflammation of the lung tissue would indicate pneumonitis. CD4 T cell counts of less than 200/microliter of blood is consistent with Pneumocystis pneumonia.
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Archaeans like Sulfolobus have multiple origins of replication. This suggests that they ____
a. are more like bacteria than eukaryotes b. are more like eukaryotes than bacteria c. have a unique form of chromosomal replication d. have multiple plasmids, whose replication must be coordinated e. have multiple chromosomes
Most mollusks are:A
found in fresh water. B. marine. C. terrestrial. D. arboreal. E. parasitic.
Some animals are facing extinction as a direct result of deliberate efforts to exterminate them because of their
perceived harm to economically useful species. Examples of these include:a. cheetahs and rhinos. b. passenger pigeons and cheetahs. c. prairie dogs and rhinos. d. rhinos and macaws. e. mountain lions and wolves.
Which category is at the top of the classification hierarchy, that is, it includes the rest of the categories given?
A. order B. genus C. class D. family E. phylum