Most of the ocean is profundal,but in the open ocean most primary productivity is in the photic zone because ___________.

Question

Quizplus · Accepted Answer

The photic zone is the upper layer of the ocean where sunlight can penetrate and provide energy for photosynthesis. Phytoplankton, which are the primary producers in the open ocean, are small floating plants that require sunlight for photosynthesis. Therefore, the correct choice is D.

Most of the Ocean Is Profundal,but in the Open Ocean