All of the following are true of the zebra mussels found in the great lakes except: a. zebra mussels are having are having a negative impact on the native population of mussels in the region. b. they were unintentionally introduced to the great lakes by humans. c. zebra mussels have caused a great deal of environmental damage to the area. d. people of the great lake region are benefitting from the economic advantages of having zebra mussels in the

d. People of the Great Lake region are benefitting from the economic advantages of having zebra mussels in the region.

Explanation:

Zebra mussel (Dreissena polymorpha) is a 3 cm long bivalve mollusk that looks similar to sea mussels. This species of mussel has proven to be a real pest in certain habitats and has caused a great deal of damage to marine life and trade in marine products. It feeds on phytoplankton, rivaling other species of mussels in obtaining this food and thus breaking the ecological balance.

The colonization capacity of this mussel allows it to clog the irrigation channels, block the inlet and outlet channels of power plants, hydraulic constructions of any kind, turbines, drains, tanks, boat motors and anchors, treatment plants, feeding channels, canals, even completely blocking water pipes and pipelines, causing numerous economic losses to humans.