Of 85 Invasive Species Entering the Great Lakes Through the St.Lawrence

question 1

Multiple Choice

Of 85 invasive species entering the Great Lakes through the St.Lawrence Seaway, 54 have been linked to transport in and discharge from ships' ballast water.Included are the zebra mussel and the quagga mussel.This information suggests that the spread of invasive species in ballast water

• A) could be easily avoided.
• B) is an accidental form of species introduction.
• C) is a rare form of species introduction and not a major concern.
• D) was not implicated in the spread of zebra mussels.
• E) is a problem only in the Great Lakes.

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