Bacteria That Live in Deep Ocean Volcanic Vents Form the Base

question 49

Multiple Choice

Bacteria that live in deep ocean volcanic vents form the base of an ecosystem that exists without light. They obtain electrons from hydrogen sulfide compounds dissolved in the vent water, and synthesize sugars from carbon, hydrogen, and oxygen. The bacteria would be classified as

• A) chemolithoheterotrophs.
• B) photolithoautotrophs.
• C) photoorganoheterotrophs.
• D) chemoorganoheterotrophs.
• E) chemolithoautotrophs.

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