Why is replication called semiconservative?
A) Only some of the leading strand is conserved.
B) Only some of the lagging stand is conserved.
C) Each new molecule of DNA contains one template stand and one daughter strand.
D) All of the above are correct.
C
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What happened to wind directions between January and July?
A) The westerlies reversed direction, becoming easterlies B) The easterlies reversed direction, becoming westerlies C) The wind directions shifted in their position relative to the equator D) The wind directions did not change between January and July
How many electrons are gained or lost in the following half-reaction? Cl2 ? 2 Cl-
A) 2 electrons are lost B) 1/2 electron is gained C) 1/2 electron is lost D) 2 electrons are gained E) 4 electrons are gained
There are three possible fates for the universe: 1. eternal expansion; 2. total collapse; or 3. some equilibrium condition with no further motion. What conditions might favor one result over the other?
A) Critical velocity—is there enough momentum to continue expansion forever? B) Critical density—is there enough mass in the universe to cause gravitational collapse? C) Critical volume—is the universe large enough for unlimited expansion? D) Critical energy—is there enough energy in the universe to maintain either expansion or collapse?
The residence time for water in any of Earth's principal reservoirs can be calculated by dividing ________.
A. rate of water removal by water supply B. rate of water removal by reservoir volume C. reservoir volume by rate of water supply D. None of these is correct. E. reservoir volume by rate of water supply, rate of water removal by reservoir volume, and rate of water removal by water supply