Which of the following statements best describes negative feedback loops? A. They respond to changes with changes in the same direction, to move a value toward an endpoint.
B. They produce negative outcomes for the organism.
C. They aren't used often in maintaining homeostasis.
D. They respond to changes with changes in the opposite direction, to keep a value in the optimal range.

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Explanation:

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explanation:

b,bacteria convert nitrates

into nitrogen gas.

d,plants and animals take in

and use nitrogen compounds.

e,bacteria break down waste    

products and return nitrogen  

to the soil.

a,bacteria convert atmospheric

nitrogen to ammonia.

c,bacteria convert ammonia

to nitrites and nitrates.

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explanation:

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