A lytic virus has infected a patient. Which of the following would best describe what is happening inside the patient?
A) The virus is causing the death of the infected cells in the patient.
B) The virus is not killing any cells in the host.
C) The virus is incorporating its nucleic acid with that of the patient's cells.
D) The virus is slowly killing the patient's cells.
E) The virus is infecting cells and then releasing only small amounts of virus.
A
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In response to induction by the optic vesicle,
a. genes coding for crystallin and keratin are activated. b. genes coding for only crystallin are activated. c. genes coding for only keratin are activated. d. genes coding for crystalline and keratin are not activated. e. apoptosis occurs.
In the ascending limb of the loop of Henle, sodium ions move out by _____, and chloride ions move out by _____.
A. diffusion, diffusion B. diffusion, osmosis C. diffusion, secondary active transport D. active transport, diffusion E. active transport, secondary active transport
One of the cell types that support and assist neurons is ____________________.
A. muscle tissue B. glial cell C. neuron D. nervous tissue E. dendrite
In studying the medium ground finch on Daphne Major, the Grants noted that each generation of finches had beaks
A. larger than those of the previous generation. B. smaller than those of the previous generation. C. best suited for their current environment. D. best suited for their parents' environment.