Less than half of the CO₂ released into the atmosphere by human activity remains in the atmosphere. The rest can be found in the oceans. What factors affect the cycling of CO₂ between the atmosphere and the ocean? A) Algae that combine bicarbonate ions with calcium (Ca²⁺) to form calcium carbonate and sink to the ocean floor when they die B) Photosynthetic rate of phytoplankton C) Respiration of organisms living in the oceans D) Both a and b E) None of the above

Question

Quizplus · Accepted Answer

Algae combining bicarbonate ions with calcium to form calcium carbonate and sink to the ocean floor when they die is one of the factors that affect the cycling of CO₂ between the atmosphere and the ocean. Similarly, the photosynthetic rate of phytoplankton is another factor that affects this cycling. Therefore, both options A and B are correct. The respiration of organisms living in the oceans does not directly affect the cycling of CO₂ between the atmosphere and the ocean, so option C is not correct.

Less Than Half of the CO2 Released into the Atmosphere

Less Than Half of the CO₂ Released into the Atmosphere