Blood returning from circulation through the body first enters the
A) left ventricle.
B) right atrium.
C) right ventricle.
D) pulmonary vein.
E) left atrium.
B
Bloom's Taxonomy: Knowledge
Section: Structures of the Cardiovascular System
Learning Outcome: 21.4
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In gel electrophoresis, DNA fragments migrate toward the negative pole of the electric field
A. true B. false
Based on the graph above, the threshold voltage appears to be approximately
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A) 60 mV.
B) 30 mV.
C) 0 mV.
D) -30 mV.
E) -60 mV.
Which of the following is the earliest known
reptile with bird-like feathers?
a. Archaeopteryx. b. Confusciusornis sanctus. c. Sinosauropteryx prima. d. Tyrannosaurus rex. e. Picarara liops
Thermus aquaticus was important in the
development of PCR in that it provided the necessary a. DNA polymerase. b reverse transcriptase. c. primers. d. DNA template. e. DNA ligase.