Grunge music , like punk rock before it ,is usually characterized by happy, upbeat songs?
a true
b false

Which characteristics best describe aaron douglass’s painting, song of the towers

24-karat gold is considered to be pure gold. 18-karat gold is considered to be about 75% gold. what is 18-karat gold considered a mixture rather than a pure substance? a) it has a variable composition of other elements and minerals. b) its color is different than pure gold. c) the gold atoms are not arranged in a repeating pattern. d) it can be melted and transformed into a different substance.

The principal effector function of igm is