In North America,a Toxic Weed Called Leafy Spurge Was Accidentally

In North America,a toxic weed called leafy spurge was accidentally introduced and has grown and spread rapidly,covering millions of acres in north central United States and south central Canada.Leafy spurge is generally avoided by cattle and horses and may be toxic to them.Thus,rangeland where leafy spurge has spread has been damaged by the invasion of this plant.
-Plants such as leafy spurge can double their population size every year in part because of their efficient production of large amounts of seeds.Populations that can double every year,such as leafy spurge,

A) will do so endlessly,eventually achieving a global distribution.
B) are examples of logistic growth.
C) probably have more predators than other species.
D) exhibit exponential growth as they spread to new regions.

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