Most phytoplankton stay near the surface to absorb red light. Indicate whether the statement is true or false
ANS: T
Red wavelengths are only able to penetrate to about 3 meters. This is why productivity is highest in the
top portion of the euphotic zone. Some Cyanobacteria can absorb blue light, allowing them to thrive at
deeper depths. Information can be found in the section Lack of Nutrients and Light Can Limit Primary
Productivity.
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