The terms algae and protozoa have significant phylogenetic meaning
A. true
B. false
B
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Considering the catabolite repression mechanism, which observation would make you suspect it is NOT occurring?
A) CRP bound to promoter sites B) elevated levels of transcripts for maltose and sucrose catabolism C) relatively low intracellular cyclic AMP levels D) RNA polymerase bound to biosynthetic promoter sequences
A virus is surrounded by a protein coat known as a ____
Fill in the blank with the appropriate word.
The chemical composition of the gases surrounding the Earth has changed substantially over the past 4 billion years. One notable change was due to the emergence of photosynthetic organisms. The process of photosynthesis increased the amount of what gas in the atmosphere?
A. Carbon dioxide (CO2). B. Nitrogen (N2). C. Hydrogen sulfide (H2SO4). D. Oxygen (O2). E. Water vapor (H2O).
A person reports to a clinic complaining of fever and abdominal pain. The abdomen is swollen, and blood tests indicate liver damage. A stool sample is examined under a microscope and found to contain eggs with a spine projecting from its surface. The indications are consistent with infection with
A) Ancylostoma duodenale. B) Enterobius vermicularis. C) Echinococcus granulosus. D) Schistosoma mansoni. E) Taenia solium.