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Biology, 21.06.2019 14:00
The image shows ekgs of a person with normal heart waves and of a person having tachycardia. based on this image, what kind of condition is tachycardia? a. the heart beats abnormally fast. b. the heart beats abnormally slow. c. the right atrium of the heart stops working. d. the left ventricle pumps less blood to the aorta.
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Biology, 21.06.2019 19:00
Iron reacts with oxygen to produce iron oxide (rust). this reaction is represented in an equation as 4fe + xo2 β 2fe2o3. identify the value of x that will balance the equation.
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Biology, 21.06.2019 19:30
All living organisms are composed of a. only one cell. b. at least 100 cells. c. at least three cells. d. one or more cells.
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Biology, 21.06.2019 21:20
Which codon is the code for the amino acid histidine (his)?
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