RNA and DNA differ in all of the following except:
A. RNA uses a different sugar from DNA.
B. RNA uses four nitrogenous bases not found in DNA.
C. RNA uses the nitrogenous base uracil (U) in place of thymine (T).
D. RNA is single-stranded rather than double-stranded.
Answer: B
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What type of energy drives the earth's hydrologic cycle?
A. solar B. geothermal C. geo-mechanical D. centripetal
Sea stacks, sea caves, and headlands are examples of differential erosion. This means that
A. they are depositional landforms. B. they are produced when rocks of different strengths are eroded at different rates. C. they are produced by the action of currents on rock. D. they are produced by wave action on rock.
Where would you expect to find the highest temperatures in July?
A) Land in the Northern Hemisphere B) Land in the Southern Hemisphere C) Ocean in the Northern Hemisphere D) Ocean in the Southern Hemisphere
Which part of Earth's cumulative hypsographic curve includes the mid-ocean ridges?
A) The gentle slope above sea level B) The long and flat part below sea level C) The shallowest slope below sea level D) The steep deepest part below sea level E) The steep segment above sea level