The major photosynthesizing organisms in the ocean are phytoplankton and algae.These organisms obtain most of the CO₂ necessary for photosynthesis from which source? A) They take it directly from the atmosphere. B) They use CO₂ dissolved in ocean water. C) They use CO₂ respired by surrounding organisms. D) They break down organic molecules in the ocean. E) They break down carbonate from ocean sediments.

Question

Quizplus · Accepted Answer

Phytoplankton and algae obtain most of the carbon dioxide necessary for photosynthesis from dissolved carbon dioxide in ocean water.

The Major Photosynthesizing Organisms in the Ocean Are Phytoplankton and Algae.These