QuestionAugust 15, 2025

2. What is the photic zone of the ocean? 3. Where does food come from in the aphotic zone?

2. What is the photic zone of the ocean? 3. Where does food come from in the aphotic zone?
2. What is the photic zone of the ocean?
3. Where does food come from in the aphotic zone?

Solution
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Answer

2. The photic zone is the sunlit upper layer of the ocean, up to about 200 meters deep, where photosynthesis occurs. ### 3. In the aphotic zone, food comes from marine snow, chemosynthesis, and predation. Explanation 1. Define the Photic Zone The photic zone is the upper layer of the ocean where sunlight penetrates, allowing photosynthesis to occur. It typically extends to about 200 meters deep. 2. Identify Food Sources in the Aphotic Zone In the aphotic zone, where sunlight does not reach, food primarily comes from organic matter falling from the photic zone (marine snow), chemosynthesis by bacteria near hydrothermal vents, and predation on other organisms.

Explanation

1. Define the Photic Zone<br /> The photic zone is the upper layer of the ocean where sunlight penetrates, allowing photosynthesis to occur. It typically extends to about 200 meters deep.<br /><br />2. Identify Food Sources in the Aphotic Zone<br /> In the aphotic zone, where sunlight does not reach, food primarily comes from organic matter falling from the photic zone (marine snow), chemosynthesis by bacteria near hydrothermal vents, and predation on other organisms.
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