Bacteria a. are not found on our bodies. b. are only found on small select parts of our bodies. c. provide protection to us from disease by covering our bodies, crowding out 'bad' invading bacteria. d. always cause disease when growing on our bodies.

The carbon cycle is best defined as a process in which a. carbon changes from inorganic forms to organic forms and back b. carbon is changed into other elements such as oxygen or nitrogen c. carbon is continually created from the sun’s energy by plants d. carbon is consumed and regenerated from other elements such as oxygen and nitrogen