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.

Question

Quizplus · Accepted Answer

The fact that 54 out of 85 invasive species entering the Great Lakes were linked to transport in and discharge from ships' ballast water suggests that this is an accidental form of species introduction. This means that it is not easy to avoid, and it is a major concern for the spread of invasive species in both the Great Lakes and other bodies of water where ships transport ballast water. The presence of the zebra mussel and quagga mussel, which are well-known invasive species, further underscores the importance of addressing the issue of ballast water discharge from ships.

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