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Bacteria at a deep sea vent make sugars using energy from inorganic chemicals. They are:

ASaprotrophs
BChemoautotrophs
CPhotoautotrophs
DHeterotrophs
Answer & Solution
Correct answer: B. Chemoautotrophs
1. No sunlight reaches the vent. 2. Chemoautotrophs extract energy from inorganic compounds. 3. Tubeworms and crabs feed on them. _Source: OpenStax Biology 2e, Chapter 8, Photosynthesis (CC BY 4.0)._
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