The earliest introduction of zebra mussels in united states probably occurs in 1986.
At that time, commercial vessels from Europe went to north America as a place for freshwater ballast stowaway. They merchants then introduced zebra mussels to the market and it gained popularity ever since. They also introduced zebra mussels population in local lakes and let them reproduce there.
Answer:
The colonies developed prosperous economies based on the cultivation of cash crops, such as tobacco, indigo, and rice.
Answer:
activity
Explanation:
Activity is a thing that a person or group does or has done or the condition in which things are happening or being done.
Explanation:
One of the most important sources of energy is the sun. The energy of the sun is the original source of most of the energy found on earth. We get solar heat energy from the sun, and sunlight can also be used to produce electricity from solar (photovoltaic) cells.
