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Question

The primary producers of the deep-sea hydrothermal vent ecosystems are

A
chemosynthetic bacteria
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B
blue-green algae
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C
coral reefs
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D
green algae
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Solution

The correct option is A chemosynthetic bacteria
Hydrothermal vents are like geysers, or hot springs, on the ocean floor. Along mid-ocean ridges where tectonic plates spread apart, magma rises and cools to form new crust and volcanic mountain chains.
Extreme temperatures and pressures, toxic minerals, and lack of sunlight characterize the deep-sea vent ecosystem.
Chemosynthesis is the process by which food (glucose) is made by bacteria using chemicals as the energy source, rather than sunlight.
Chemosynthetic bacteria convert the toxic vent minerals into usable forms of energy through a process called chemosynthesis, providing food for other vent organisms.
Blue-green algae, green algae and coral reefs need sunlight for photosynthesis.

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