Description acceptable. In the “cloud-in-clouds” problem, these regions correspond to the outer clouds. In an Einstein-de Sitter universe, a ratio named for these objects is exactly equal to 18 times pi squared at virialization. These regions are perturbations with a “top-hat” shaped profile in the spherical collapse model, which models their growth. (15[1])The aforementioned (15[1])ratio named for these objects is symbolized delta and is often rounded to 200 in calculations of virial radius. These regions in the primordial plasma generate (*) baryon acoustic oscillations (-5[1])in (10[1])the CMB spectrum. These regions are produced by the amplifications of quantum fluctuations by inflation, (10[1])and therefore serve as the “seeds” of structure formation. For 10 points, name these regions where a quantity equal to mass over volume is greater than that of the universe as a whole. ■END■ (10[2]0[3])