Species of Oak Trees Periodically Have Years of Large Acorn

question 48

Multiple Choice

Species of oak trees periodically have years of large acorn production, followed by years of lower acorn amounts. In years of plenty, squirrel populations will experience an increase due to increased availability of acorns. Then squirrel populations will decrease after lower acorn abundance. This is an example of

• A) a population cycle.
• B) NPP.
• C) a renewable resource.
• D) a density-independent factor.

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