Answer:
In the deep ocean layers where the sunlight does not reach, these organisms that are chemoautotrophic use sulfides from the hydrothermal vents to perform chemosynthesis instead of photosynthesis.
Explanation:
Chemoautotrophic organisms are the ones that are adapted to the absence of sunlight. Such organisms identify electron donors in their vicinity and derive energy from the oxidation reactions that these electron donors (mostly, inorganic compounds) undergo.
The major reason for the development of such a trait in these organisms is the depth that they live at. On deep-sea floors, there is an abundance of sulfides. Thus, the organisms living on there make use of the sulfides to fix carbon and obtain energy the required energy to sustain.
The process of chemosynthesis occurring on deep-sea floors due to the presence of carbon, sulfides, and oxygen culminates in the production of organic materials as an end result which the organisms feed on and sustain even when there is no sunlight available. These organisms majorly belong to the bacteria species called Archaea and Extremophiles.
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Are a group of related languages all derived from Vulgar Latin within historical times and forming a subgroup of the Italic branch of the Indo-European language family.
The western roman empire was weakened by the high cost of defending the empire.
At its zenith, the Roman empire stretched from the Middle East to the Atlantic Ocean. It being a vast territory, was not easy to govern and due to its vastness the empire faced logistical as well as administrative issues.
Even though they had excellent road systems, the Romans were still not able to effectively manage their territories. They had to struggle in order to maintain enough resources and troops so that they could defend themselves from the rebellions and outside attacks. Emperor Hadrian even constructed a wall in Britain so as to keep the enemies away.
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