SCIENCE
ENVIRONMENTAL SCIENCES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The water temperature is too cold
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There is no sunlight
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There are not enough nutrients
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The salinity level of the water is too high
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Detailed explanation-1: -Below the photic zone, from 200 to 1, 000 meters, is the aphotic (a meaning without and photic meaning light) zone. In the aphotic zone; all that’s left of sunlight is a dim, dark, blue-green light, too weak to allow photosynthesis to occur.
Detailed explanation-2: -This process is called photosynthesis. In the deep ocean, many hundreds of meters away from the sun’s rays, another process is taking place: chemosynthesis. Tiny microbes use chemical energy instead of light to combine water and carbon dioxide to make sugar.
Detailed explanation-3: -Ocean water absorbs light, so light availability decreases exponentially with depth. Below about 200 meters or 650 feet, there’s not enough light for photosynthesis to take place.
Detailed explanation-4: -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-5: -Sunlight acts as the light source essential for the process. At night, due to absence of sunlight, photosynthesis stops.