Which of the Following Is NOT Necessary to Keep a Balanced

question 7

Multiple Choice

Which of the following is NOT necessary to keep a balanced (stable) ecosystem going?

• A)Matter (i.e.,elements)has to cycle.
• B)There must be an outside energy source.
• C)Various populations of producers and consumers must be proportional.
• D)Bacteria and fungi should be eliminated.
• E)Energy must be allowed to flow through the ecosystem.

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