Which of the following cycles does not involve living organisms? . a.. carbon cycle. b.. oxygen cycle. c.. rock cycle. d.. nitrogen cycle.

Which of the following insects is a decomposer? a. mosquito. b. caterpillar. c. beetle. d. none of the above.

Which characteristics of temperature and salinity have the greatest influence on the movement of deep-ocean currentsa. warm and low salinityb. cold and high salinityc. cold and low salinityd. warm and high salinity

Soil color only reflects the amount of organic matter present in soil.