In a resting person what percentage of blood pumped by the right ventricle enters the lungs?
a. 0 percent
b. 10 percent
c. 20 percent
d. 50 percent
e. 100 percent
ANSWER: e
Biology & Microbiology
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True or False: A small, local population of organisms is very sensitive to drastic environmental changes, but is unaffected by predation
A. true B. false
Biology & Microbiology
The polymerase chain reaction was devised by:
a. Francis Crick. b. Walter Gilbert. c. E.M. Southern. d. Kary Mullis. e. Leland Hartwell.
Biology & Microbiology
The Social Security fund is maintained by a federal tax on the earnings of employed people. Which group of workers should be encouraged to live temporarily in the country?
A) young unmarried males B) young married couples C) elderly females D) retired couples
Biology & Microbiology
An atom of potassium that has 19 protons and 18 electrons. Does this atom have a positive or negative net electric charge?
Biology & Microbiology