The Availability of Oxygen and Other Electron Acceptors Is the Most

question 49

Multiple Choice

The availability of oxygen and other electron acceptors is the most important determinant of the types of metabolism in a habitat. Which of the following is NOT true about anaerobic environments?

• A) They have slower rates of assimilation compared to aerobic habitats.
• B) Their rates of dissimilation are slower compared to aerobic environments.
• C) Microbes sometimes use minerals such as NO₂- to oxidize organic compounds.
• D) Anaerobic microbial biomass far exceeds that of the oxygenated biosphere.
• E) Respiration of organic compounds is highly dissimilatory, reducing them to CO₂.

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Definitions:

Environmental Stressors

External factors or conditions in the environment that can cause stress, such as noise, pollution, or extreme temperatures.

Physiological Reaction

A bodily response to a stimulus, which could be anything from an emotional event to a physical touch.

Cognitive Coping

Strategies that involve the conscious effort to solve personal and interpersonal problems, and seeking to master, minimize, or tolerate stress or conflict.

Hypothalamus

A region of the brain responsible for the regulation of certain metabolic processes and other activities of the autonomic nervous system, including hunger and temperature control.