Bacteria lives in the digestive systems of cows. the bacteria receive nutrients from the food the cows eats. this relationship is mutualism i've because the cows.

What process is believed to be responsible for the formation of the grand canyon? a) diverging tectonic plates b) converging tectonic plates c) erosion over a long period of time d) caving in of the ground due to erosion

Which of the following is not permitted in a roundabout? a. using your turn signal b. following the rules of right-of-way c. driving at the speed limit d. changing lanes

How much hazardous chemical waste is produced per year in the us?