Your Research Group Is Interested in Studying a Bacterium Known

question 91

Multiple Choice

Your research group is interested in studying a bacterium known to associate with the roots of soybean plants.When the bacterium is present, the plants grow taller and produce higher yields.Choose the experimental setup that would provide an explanation for this observed phenomenon.

• A) Incubate the bacterium with nitrate, and observe whether atmospheric N₂ is released.
• B) Incubate the bacterium in a solution bubbled with N₂ gas, and observe whether NH₄⁺ accumulates in solution.
• C) Incubate the bacterium with ammonia, and observe whether nitrate forms.
• D) Incubate the bacterium with nitrite ions, and observe whether nitrate forms.
• E) Incubate the bacterium with ammonia, and observe whether atmospheric N₂ is released.

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Definitions:

Hip

A region on each side of the human body where the thigh bone (femur) joins the pelvis, forming a ball-and-socket joint.

Genetic Background

An individual's unique set of genes that contributes to their physical and physiological traits inherited from their parents.

Subcutaneous Fat

The layer of fat located just beneath the skin, which serves as insulation and energy storage for the body.

Skinfold Measurement

A method for estimating body fat percentage by measuring the thickness of skinfolds at various body sites.