If DNA is described as resembling a ladder in structure, the "sides" of the ladder consist of ________ and the "rungs" of the ladder consist of ________.
A. sugar and nitrogenous bases; phosphate
B. sugar and phospholipids; nitrogenous bases
C. sugar; phosphate
D. sugar and phosphate; nitrogenous bases
Answer: D
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Which of the following locations would contribute to mid-latitude cyclogenesis?
A. the upwind side of a mountain chain B. relatively cold water offshore from a warm land mass C. along cold constant pressure surfaces D. relatively warm water offshore from a cold land mass
The site on the figure below that would most likely form a rock with large crystals is
A) A.
B) B.
C) C.
D) D.
E) E.
How many times did the Earth's magnetic field switch from north to south in the last 10 million years?
A. never B. seldom-less than 5 times C. many-more than 20 times
Sinkholes are becoming more prevalent in Florida, especially where populations are growing. Discuss how sinkholes form, and explain what might account for the observed increase in Florida