True.
There are particles of water vapor, liquid, and pollen, solid, in the atmosphere at all times.
I think it might be C, as the genome is specific to an individual, so the gene pool is that for the population, I suppose.
Answer: Wind-blown sand grains striking any solid object in their path can abrade the surface. Rocks are smoothed down, and the wind sorts sand into uniform deposits. The grains end up as level sheets of sand or are piled high in billowing sand dunes.
Explanation:
A. because the hormone secreted is parathormone which regulates the calcium in the blood.
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