Origin and Distribution

Brazilian Elodea orginally came from South America, specifically Brazil, Uruguay, and Argentina.
  True
  False

Transportation

Brazilian Elodea were brought to the U.S. because _______?
  A. I can turn carbon dioxide into oxygen.
  B. I'm a great plant to have in aquaruims.
  C. I'm good to eat.
  D. I keep fish alive.
  E. A, B, & D.
  F. All of the above.

Environmental Impact

Brazilian Elodea grows very densely therefore causing the following problems:
  A. I make it hard for water to move, lowering the water quality.
  B. I push out other plants and animals.
  C. I clog up water intake pipes and make it hard to fish.
  D. People can easily move thru me with boats, swimming or water skiing.
  E. A, B, & C.
  F. A, B, & D.

Economic Impact

Brazilian Elodea is a popular aquarium plant but problems occur when it is introduced into lakes and ponds. Those problems can be very costly, such as ____________.
  A. Brazilian Elodea can spread 100 acres every year.
  B. Closing of parks on Lake Michigan due to growth of Brazilian Elodea in swimming areas.
  C. Electrical generating plants shutting down due to fragments of Brazilian Elodea clogging intake structures on          the Waikato River in New Zealand.
  D. In Silver Lake, Cowlitz County the cost of the control project is over one million dollars.
  E. A, C, & D.
  F. All of the above.

Control

Brazilian Elodea can be easily controled with herbicides, covering with fabric, mechanical (chopping) methods, draining the water and biocontrol (ex. grass carp).
  True
  False