Appreciable amounts of sugar can be dissolved in which of the following solvents?
A) benzene (C6H6)
B) water
C) both a and b
D) neither a nor b
B
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The oldest ocean floor is less than 200 million years old. Indicate whether the statement is true or false
How many histones are part of a nucleosome?
A) 1 B) 2 C) 4 D) 8
In the diagram below, the importance of the falling precipitation at "A" for the global carbon cycle is that
A. the falling rain lubricates the Earth's surface, making crustal deformation more likely, which would bring carbon stored in the lithosphere back up to the atmosphere, warming the Earth. B. the falling rain makes carbon in the atmosphere more inert-giving it much greater potential to act as a greenhouse gas and warm the Earth. C. the falling rain brings CaCO3 which was trapped in the atmosphere to the surface, cooling the Earth. D. CO2 combines with water to form H2CO3, removing carbon from the atmosphere and cooling the Earth.
Which of the following plate boundaries is least likely to see any volcanic activity?
a. oceanic crust converges with continental crust (O-> <-C) b. oceanic crust converges with oceanic crust (O-> <-O) c. continental crust diverges from continental crust (<- C C ->) d. continental crust converges with continental crust (C-> <-C)