Pyelonephritis may result from
A) urethritis.
B) cystitis.
C) ureteritis.
D) systemic infections.
E) All of the answers are correct.
E
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The concept of a species was proposed by
A. Charles Darwin. B. John Ray. C. Carolus Linneaus. D. Erasmus Darwin. E. George Cuvier.
What prevents a plant cell from bursting in a hypotonic solution?
a. plasma membrane b. transport proteins which help pump the excess water out of the cell c. cell wall d. a plant cell will not burst in a hypotonic solution because water is moving out of the cell
The mass extinction at the end of the Cretaceous period was likely the result of:
a. rising seawater. b. loss of vegetation. c. extreme predation. d. a dramatic change in climate. e. the appearance of new competitors.
The Central Dogma of biology can be stated as
A. proteins? RNA? DNA. B. DNA? proteins? RNA. C. RNA? DNA? proteins. D. DNA? RNA? proteins.