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.
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Explanation:
A system of government in which powers are divided between the a central government operating nationally in a country and the states government is known as Federalism or say Federal Government. Federal Government has the Judiciary, legislative and the executive arms or branches of government, which is also applicable to state governments, the state government also can create local governments. Not all power is given to the Federal Government according to the 10th Amendment, some powers are given to the state in which Federal Government has no such power.
Nonetheless,few of the things the federal government guarantees state government the following things;
(1). PROTECTION: apart from the normal protection against criminality, the federal government guarantees the state government from other countries from invading into the states' territory.
(2). STABILIZING INTERNAL DISORDER: federal government help to protect and stabilize any internal disorder in the states.
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Explanation: irms will engage in non-price competition, in spite of the additional costs involved, because it is usually more profitable than selling for a lower price and avoids the risk of a price war. For example, brand-name goods often sell more units than do their generic counterparts, despite usually being more expensive. i hope this was helpful to u
