What Makes the Metabolism of Ferroglobus Interesting in the Context

question 85

Multiple Choice

What makes the metabolism of Ferroglobus interesting in the context of evolution?

• A) Ferroglobus is an anaerobic iron-oxidizing chemolithotrophic autotroph that may represent a key metabolism that allowed for the oxidation of ferrous iron without molecular oxygen.
• B) Ferroglobus can use H₂ or H₂S as electron donors in its energy metabolism and is thermophilic, thus representing the earliest hypothesized forms of life.
• C) Ferroglobus lacks cells wall and becomes encrusted in oxidized iron.
• D) Ferroglobus is both an iron- and nitrate-reducer and is probably the last common ancestor of all iron- and nitrate-reducing organisms.

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Definitions:

Learning

The process of acquiring new understanding, knowledge, behaviors, skills, values, attitudes, and preferences.

Biofeedback Training

A technique that teaches individuals to improve their health by controlling certain bodily processes that normally happen involuntarily.

Operant Conditioning

A learning process through which the strength of a behavior is modified by reinforcement or punishment, introduced by B.F. Skinner.

Unconditioned Response

A naturally occurring response to an unconditioned stimulus, such as salivating when smelling food.