Which of the following compounds are nonelectrolyte? a) sodium bromide b) magnesium sulfate c) carbon tetrachloride d) calcium hydroxide

Which statement about sound is not true? a. air particles travel with sound waves. b. sound waves cannot travel through a vacuum. c. sound waves exist even if no one hears them. d. air particles vibrate along the path of a sound wave.

1) these are barrel shaped microtubules in most animal cells, that organize the spindles during cell division

1) this is the structure in the cell nucleus that houses a cell's genetic information