Question

multiple - choice question phytoplankton produces what percentage of oxygen for the entire world? 57% 55% 50% 60%

Explanation:

Phytoplankton are important primary producers in the ocean and are estimated to produce about 50 - 55% of the oxygen in the Earth's atmosphere. Among the given options, 55% is the most accurate estimate within the common - cited range.

Answer:

B. 55%