The homosphere is so called because
A) it is the habitable sphere for humans (Homo sapiens).
B) it contains only one gas, nitrogen.
C) scientists had already named the heterosphere and need to somehow differentiate it from the other compositional layer.
D) the blend of gases is nearly uniform throughout.
E) scientists have been unable to determine its composition and assume it is homogeneous.
D
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Fill in the blank(s) with correct word
________ is/are formed during primary wastewater treatment
A) Bacteria B) Inorganic nutrients C) Gray water D) Sludge E) Toxins
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