ECOLOGY
BIOMES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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the ocean’s dark lower layer where photosynthesis cannot occur
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the sunlit upper layer of the ocean where photosynthesis occurs
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on the bottom of lakes, streams, and oceans.
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where benthos are found
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Detailed explanation-1: -Below the photic zone is the dark aphotic zone, where photosynthesis cannot occur. Many aquatic organisms live on, or in, rocks and sediments on the bottoms of lakes, streams, and oceans. These organisms are called the benthos, and their habitat is the benthic zone .
Detailed explanation-2: -Though photosynthesis cannot occur in the aphotic zone, it is not unusual to find an abundance of phytoplankton there.
Detailed explanation-3: -Such a minuscule amount of light penetrates beyond a depth of 200 meters that photosynthesis is no longer possible. The aphotic zone exists in depths below 1, 000 meters. Sunlight does not penetrate to these depths and the zone is bathed in darkness.
Detailed explanation-4: -Photosynthesis requires sunlight, and in the aphotic zone, there is little to no sunlight available for photosynthesis. This is key for many plants and serves as the major factor.
Detailed explanation-5: -The darkness layer or Aphotic Zone is entirely dark meaning there is no light. About 90% of the ocean is in this layer. The whale shark, like most marine organisms, is typically found in the sunlight layer or photic zone of the open ocean layers.