ECOLOGY
BIOMES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Coral Reefs
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The Deep Sea
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Rivers
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Wetlands
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Detailed explanation-1: -Obviously, organisms who live at the deep sea vents can’t rely on the Sun; instead, many of them rely on the chemicals that come out of the vents-the process they use to create food is called chemosynthesis instead of photosynthesis.
Detailed explanation-2: -Sunlight entering the water may travel about 1, 000 meters into the ocean under the right conditions, but there is rarely any significant light beyond 200 meters. The ocean is divided into three zones based on depth and light level. The upper 200 meters of the ocean is called the euphotic, or “sunlight, ” zone.
Detailed explanation-3: -The deep sea is an extremely harsh environment. It is dark, below 200m the light levels are too low for photosynthesis (the twilight zone), and not a glimmer of sunlight remains beyond 1, 000m (the midnight zone). The water is very cold (37-50oF/3-10oC) and consequently has low levels of oxygen.