Origin and Distribution

Which three (3) continents does the water chestnut call "home"?
  A. North America, South America, Africa.
  B. Asia, Africa, South America.
  C. Europe, Asia, North America.
  D. Europe, Asia, Africa.

Transportation

Water chestnuts were intentionally introduced into the U.S.
  True
  False

Environmental Impact

Which of the following is NOT an environmental impact of the water chestnut?
  A. Out-competes native aquatic vegetation.
  B. Blocks penetration of sunlight into the water.
  C. Produces a toxin that seeps into the water, killing larval fish.
  D. Chokes surface of lakes and calm rivers.
  E. Reduces dissolved oxygen levels in the water.

Economic Impact

In 2006, how much money in total was spent to control water chestnut in Lake Champlain?
  A. $150,000.
  B. > $450,000.
  C. $63,000.
  D. $40,000.

Control

Two commonly-used methods for controlling water chestnut are hand-pulling and mats:
  True
  False