What is the MOST important role that nucleic acids play in living organisms on Earth?
A) long-term energy storage and cell structure
B) basic functioning of living organisms
C) the storage and transfer of information
D) short-term energy storage
C
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A river flows toward the East at 2.2 m/s. Steve can swim 2.5 m/s in still water. If he wishes to cross the river so that his direction is northward, how long will it take him to cross the 75 m wide river?
A. 34 s B. 39 s C. 30 s D. 63 s
A 2.0 ?F and a 4.0 ?F capacitor are connected in series across an 8.0-V DC source. What is the charge on the 2.0 ?F capacitor?
A) 2.0 ?C B) 4.0 ?C C) 12 ?C D) 11 ?C E) 25 ?C
Temperature differences between nighttime and daytime on Earth are relatively small due to
A) polar regions absorbing most solar energy. B) Earth being 70% water. C) Earth's relatively high daily spin rate and shortness of nighttime. D) seasonal fluctuations and Earths magnetic field.
In the picture shown, in which hemisphere is the person located and the location of the Sun is above what geographic point on Earth?
a. northern, north of the equator b. southern, south of the equator c. northern, south of the equator d. southern, north of the equator