In Light,purple Sulfur Bacteria Use H₂S as an Electron Donor

question 43

Multiple Choice

In light,purple sulfur bacteria use H₂S as an electron donor and release pure sulfur as a waste product.They are examples of

• A) photoautotrophs.
• B) photoheterotrophs.
• C) chemoautotrophs.
• D) chemoheterotrophs.
• E) deep-sea,volcanic vent bacteria.

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Definitions:

Motivational States

Internal conditions that activate behavior towards a goal or push for satisfaction of a need.

Appetitive Stimulus

A pleasant or desirable stimulus that an organism is drawn towards or seeks out, often used in the context of behavior reinforcement.

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