Which Density-Dependent Process Contributed Most Significantly to the Recovery of the North

question 44

Multiple Choice

Which density-dependent process contributed most significantly to the recovery of the North American monarch butterfly population after the severe winter losses of 2002?

• A) Unusually mild weather in the eastern United States greatly improved juvenile butterfly survival.
• B) Butterfly predators starved when the monarch population dropped, and by the time it had recovered, Monarch population numbers were back up.
• C) Egg production is inversely proportional to density; the surviving monarchs had ample resources and experienced maximal reproduction.
• D) With fewer returning adults, there was less competition for food among the young caterpillars, and their survival rate was unusually high.

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