The upper boundary of the aphotic zone is determined by the depth of solar light penetration.

Name: The upper boundary of the aphotic zone is determined by the depth of solar light penetration.
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Question

Quizplus · Accepted Answer

The aphotic zone is the portion of the ocean where no sunlight penetrates. Therefore, the upper boundary of the aphotic zone would be determined by the depth at which solar light can no longer penetrate, which is the point where the photic zone ends.

The Upper Boundary of the Aphotic Zone Is Determined by the Depth