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Question

_________ are the primary producers of the deep sea hydro-thermal ecosystem

A
Coral reefs
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B
Green algae
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C
Chemosynthetic bacteria
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D
Blue-green algae
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Solution

The correct option is C Chemosynthetic bacteria
Hydrothermal vents are located very deep on the ocean floor; these are like geysers, or hot springs where sunlight is unable to penetrate.

The primary producers of the deep sea hydro-thermal ecosystems are archaebacteria. These have chemosynthetic modes of nutrition. Instead of using light energy to convert carbon dioxide into sugars like green plants, they harvest chemical energy from the minerals and chemical compounds. This process is known as chemosynthesis.

Chemosynthetic bacteria use inorganic molecules, such as ammonia, molecular hydrogen, sulphur, hydrogen sulphide and ferrous iron, to produce the organic compounds needed for their sustenance.

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