[Campbell Biology P.1230] What proportion of Earth's total photosynthetic activity is account... | Practice Question

What proportion of Earth's total photosynthetic activity is accounted for by photosynthetic plankton in the oceanic pelagic zone?

  • A: Approximately one-quarter.
  • B: Less than one-tenth.
  • C: About half.
  • D: The vast majority, over 80%.

Explanation

The 'Photosynthetic Organisms' section for the Oceanic Pelagic Zone states: 'Because of this biome's large size, photosynthetic plankton account for about half of the photosynthetic activity on Earth.'