Biology · Man and His Environment
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In which of the following regions organic materials and shells are found
- A
Littoral
- B
Abyssal
- C
Euphotic
- D
Bathyal
The seafloor and water column from 3,000 to 6,500 metres (9,842 to 21,325 feet) depth is known as the abyssal zone, or the abyss. Sunlight doesn't penetrate to these depths, so the waters here are extremely dark, and the animals that live here often use bioluminescence to communicate. Organic matter, organic material, or natural organic matter refers to the large source of carbon-based compounds found within natural and engineered,terrestrial, and aquatic environments. It is matter composed of organic compounds that have come from the faeces and remains of organisms such as plants and animals.
The littoral zone is near the shore and often has a mix of sand, silt, and organic material. However, it is not known for the abundance of decomposing organic matter and shells found in deeper ocean zones.
The abyssal zone, at depths of 3,000 to 6,500 meters, is a deep ocean zone where sunlight does not reach. Organic materials and shells accumulate here due to the decomposition of marine life that sinks to these depths.
The euphotic zone is the sunlit upper layer of the ocean where photosynthesis occurs, but it is not where organic materials and shells typically accumulate in large amounts.
The bathyal zone extends from the edge of the continental shelf to around 2,000 meters deep. While it does contain some organic material, it's not as significant as in the abyssal zone.
Tagged under Biology · Man and His Environment · 2008