Figure 28.1 -Bacteria Able to Perform the NH₄⁺ + NO₂⁻ → N₂

question 28

Multiple Choice

Figure 28.1

-Bacteria able to perform the NH₄⁺ + NO₂⁻ → N₂ + 2H₂O reaction have been discovered in laboratory bioreactors and wastewater treatment systems.Researchers predicted that these bacteria should exist in oceans.They measured the concentration of NH₄⁺,NO₂⁻,NO₃⁻,and O₂ in the Black Sea as a function of water depth (M.Kuypers et al.2003 Anaerobic ammonium oxidation by anammox bacteria in the Black Sea.Nature 422:
608-11) to determine where in the sea the bacteria might live.Analyzing data presented in Figure 28.1 above,at what depth would you expect to find the bacteria? (Note:
In the figure,different scales are used to show concentrations of NH₄⁺,NO₂⁻,NO₃⁻,and O₂. )

• A)in the top 5 meters
• B)in the top 50 meters
• C)at a depth of 75 meters
• D)at a depth of 92 meters
• E)below 100 meters

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Definitions:

Behavior Therapy

A type of psychotherapy that focuses on changing undesirable behaviors through conditioning and learning.

Controlled Outcome Research

Research designed to evaluate the effectiveness of a treatment or intervention by comparing outcomes between a group receiving the intervention and a control group.

Bowenian Family Systems

A theory in family therapy that views the family as an emotional unit and uses systems thinking to describe complex interactions within the family.

Differentiation

In developmental psychology, differentiation refers to the process by which children or adolescents develop a sense of individuality, separating their identity from that of their parents or family.