As you are researching the Zebra Mussel, keep in mind the following questions. 1. Where is this organism found? 2. How was this organism transported to its new ecosystem? 3. Was it intentionally transported, and if so, for what reason? 4. Why is this organism able to spread so rapidly in its new ecosystem? 5. What is the effect of this organism on the ecosystem’s current food web? 6. Is this organism affecting the lives of humans? 7. How is it affecting the lives of humans? 8. Are there any plans for controlling or removing this organism?

The zebra mussel is found in freshwater lakes and rivers of the Balkans, Poland, and the former Soviet Union. It was first found in the United States in Lake St. Claire, off of the eastern shore of the state of  Michigan.

Biologists think the zebra mussel was picked up in a freshwater European port in the ballast water of a ship, and was later released into the water on the Canadian side of Lake St. Clair. The zebra mussel was not intentionally transported into its new ecosystem.

The zebra mussel is small, free-swimming, and easily spread by water currents, and can attach to almost any hard surface.

The zebra mussel affects an ecosystem's food web both positively and negatively. The positive effects include serving as a food source to many native fish, birds, and other animals. The negative effects include interfering with other organisms' feeding, growth, movement, respiration, and reproduction.

  the   balanced   equation   for   reaction of   ca metal   with   o2 to   produce   cao   is as below

2 ca+ o2→ 2 cao2

  explanation

the reaction is   balanced     since the   number of atoms   in reactant side is   equal to   number of atoms   in   product side.   for   example   they   are 2   atom of   ca in   reactant   side   and   2   atoms of ca   in   the product side.

  the   process   is a   meet the   requirement   of   redox   reaction because :     calcium   is   oxidized   from   oxidation state 0   to 2+   while   oxygen   is reduced from   oxidation   state   0   to 2-