If the radiation you received from your X-ray does pose a health risk, how can this radiation cause the greatest harm?
A) Your DNA in cells that were radiated may be damaged by causing mutations.
B) Enough of your blood cells in the irradiated region may have been killed to make you sick.
C) Your nerves in the irradiated region may have been killed, causing you to lose sensation and control.
D) Most of the cells in the irradiated region were heated and killed by the X-ray energy.
A
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a. cross-cutting b. fossils c. radioactivity d. inclusions e. superposition
Which of the following describes the location where a lee-side low forms?
A. near the poles B. near the equator C. on the downwind side of a mountain D. on the upwind side of a mountain
In which of the following regions is shifting cultivation a prominent form of agriculture?
A) South Asia B) East Asia C) North Africa D) Sub-Saharan Africa E) Central America
Rock that has formed from cooling magma or lava is
A. metamorphic rock. B. sedimentary rock. C. igneous rock.