When an object rests on a surface, such as a table, for example, the downward force it applies to the surface is counteracted by an equal but upwards force, or reaction, applied by the surface. See more at Newton's laws of motion. A response to a stimulus, such as a reflex.
State. Aquatic Invasive Species: Snakehead (PDF | 201 KB). Indiana Department of Natural Resources. Northern Snakehead. Maryland Department of Natural Resources. Northern Snakehead Fish (Channa argus). New York Department of Environmental Conservation.
  The northern snakehead fish is said to not be a threat to humans. However, a more vicious species, the giant snakeheads have reportedly attacked and even killed peo â¦ ple who have went near its young. They have been found in Maine, California, Florida, Hawaii, Maryland, Massachusetts, and Rhode Island. The northern snakehead fish is said to not be a threat to humans. However, a more vicious species, the giant snakeheads have reportedly attacked and even killed peo â¦ ple who have went near its young. They have been found in Maine, California, Florida, Hawaii, Maryland, Massachusetts, and Rhode Island.