Biology Forums - Study Force

Consumption in phytoplankton usually exceeds carbohydrate production which is why we end up with
  oxygen. Indicate whether the statement is true or false.

ANS: F
When phytoplankton photosynthesize, they also respire. They use some of the oxygen and carbon
dioxide they produce. Normally, carbohydrate production exceeds consumption. Information can be
found in the section Production Equals Consumption at the Compensation Depth.