The replication illustrated here is termed
a. dominant.
b. recessive
c. semiconservative.
d. conservative.
e. hemiconservative.
C
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In describing the parts of the respiratory system, the word "septum" designates a partition in the
a. larynx. b. nasal cavities. c. pharynx. d. glottis. e. lungs.
The selective advantage linked to the high frequency of the cystic fibrosis allele in Caucasians is:
a. an increased resistance to falciparum malaria. b. the prevention of excessive water loss associated with certain types of diarrhea. c. production of an enzyme to break down cholera toxin. d. increased mucous secretions for the removal of infectious cells. e. an increased probability of Salmonella infection.
Once they evolved, the ________ forever changed the atmosphere on Earth.
A. protists B. land plants C. bacteria D. cyanobacteria
Some of the structural components of Staphylococcus act as virulence factors. Which of the following components inhibits chemotaxis and phagocytosis, inhibits proliferation of mononuclear cells?
A. Capsule B. Peptidoglycan C. Protein A D. Teichoic acid E. Slime layer