Which of the following best describes the solar radiation absorbed by and radiated from earth?
a. most incoming solar energy is absorbed by the atmosphere.
b. only a small fraction of energy radiating from earth is from the atmosphere.
c. the earth's surface is responsible for a small fraction of heat radiation to space.
d. earth's surface absorbs little of the energy that strikes as solar radiation.
c
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b.

b. read the phase at the intersection of any given temperature and pressure.

the fossil record provides evidence of a common ancestor to many species.

hypoxemia refers to a below usual concentration of oxygen in the blood, mainly in the arteries. hypoxemia is an indication of an issue associated with circulation or breathing and may lead to various symptoms like shortness of breath.  

the condition is identified by determining the level of oxygen in the blood sample obtained from an artery. it can also be predicted by determining the oxygen saturation of the blood with the application of a pulse oximeter.  

the normal arterial oxygen is about 75 to 100 mm hg. the values underneath 60 mm hg is generally considered with the requirement for supplemental oxygen. the normal pulse oximeter readings generally range between 95 to 100 percent. the values under 90 percent are regarded as low.  

in the given case, the oxygen saturation is measured at 93 percent, hence, there is no need to administer oxygen, that is, one should withhold oxygen.