Which base found in RNA is not found in DNA?
A) adenine
B) cytosine
C) guanine
D) uracil
D
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Viruses are responsible for all the following diseases except
A. AIDS. B. the common cold. C. malaria. D. influenza (the flu).
Flat, stable areas of continental crust tend to be located ________
A) in areas that receive large amounts of rainfall B) along coastlines C) in the interior of continents D) near desert regions
There are websites that predict solar weather, or essentially the impact of the solar wind on earth (in one sense, our planet is within the outer atmosphere of the sun). How is this possible when the speed of light is a fixed quantity?
A) The solar weather is related to sunspots, and they only affect Earth when the sunspots are in line with the earth, so knowing the solar rotation speed, you can predict when sunspots are aimed at Earth. B) The solar weather effect on Earth depends largely on the earth's magnetic field and its interaction with Earth weather, so scientists predict variations in both. C) The solar wind does not travel at the speed of light, so it arrives much later than when a solar event is observed. D) The solar forecast is like weather forecasting on Earth; solar scientists observe phenomena as they form and grow on the sun, and predict their timing
The inner ________ zone extends to the depth at which marine algae no longer grow attached to the ocean bottom
A) bathyal B) littoral C) sublittoral D) subneritic E) supralittoral