Atmospheric ________ is absorbed by the biosphere during photosynthesis, stored in living organisms and in the soil, and released through respiration
A) water
B) carbon
C) nitrogen
D) hydrogen
Answer: B
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The following seismic waves are used to locate the earthquake epicenters:
A. surface waves and P waves. B. Rayleigh waves and P waves. C. P waves and S waves. D. surface waves and S waves. E. L waves and S waves.
El Nio is a shift in the circulation in the Pacific Ocean that occurs every year in December.
a. true b. false
Which of the following statements about anabolic steroids is false?
A) Olympic champions have lost their medals because of steroid testing. B) They are all naturally occurring materials. C) They cause female athletes to show male secondary sex traits. D) They increase muscle mass.
In passing over a dune, wind scours sand from the downwind or slip face.
Answer the following statement true (T) or false (F)