1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Ilya [14]
3 years ago
14

How were zebra mussels introduced in the united states

Social Studies
1 answer:
enyata [817]3 years ago
4 0

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.

You might be interested in
Imagine you are watching several dozen passengers sitting in an airport gate area waiting to board a plane. These people are an
Bess [88]

Answer:

the answer you're looking for is simply : crowd

5 0
3 years ago
2. Several years from now, your best friend asks you to help move all of his furniture out of his parents' house into his new ap
PolarNik [594]

Answer: Social exchange theory and reciprocity norms both involve the understanding of the mutual benefits.

Explanation:

Social exchange theory: This is a sociological as well as psychological theory analysis the social behavior of the two parties during their interaction. This is associated with cost and benefit association. The parties think about the benefit and risk of their mutual association. According to the given situation, if my best friend ask me for moving the furniture out of the parent's house without bothering about me for many years and asking for favor for own motive. According to the social exchange theory I should help him by asking to get some own work done or I can ask him to pay some amount that will be utilized during the transportation and dislocation of the furniture. I may also think about the risk of transfer of the furniture as it may cause injury to be due to physical strain by lifting furniture.

Reciprocity norm: It is the process of exchange of things between people to attain mutual benefit. Here, I should ask for a help or money to my friend in return of favor of translocating the furniture.

5 0
3 years ago
Type the correct answer in the box.
Assoli18 [71]

Answer:

The Harappans  used clay and mud  to make <u>fired bricks</u>

Explanation:

8 0
3 years ago
Read 2 more answers
Students in mrs. evan's first grade class are given tokens for positive behavior. at the end of the school week, students are ab
horsena [70]
<span>The tokens act as secondary reinforcers. A secondary reinforcer is one that is associated with a primary reinforcer. In order for the reinforcer to achieve its objective, the person has to learn the association between the primary and the secondary reinforcer. For example, money is a secondary reinforcer, food is a primary reinforcer. When we see the money we are motivated by the association we make; <span>buy food with the money.

I hope my answer can help you.
</span></span>
3 0
3 years ago
Which was NOT an impact of the 1868 Kimberley diamond mine discovery in South Africa?
kicyunya [14]

The correct answer is D) Cecil Rhodes and other investors began to claim resources and take political control in Africa.Glad i could help

5 0
3 years ago
Read 2 more answers
Other questions:
  • Booker T. Washington was a speaker, writer, and educator BEST known for
    12·1 answer
  • Help Asap! 20 Points!
    11·1 answer
  • Who was the first king of the united states
    7·1 answer
  • Which clause of the United States Constitution requires states to support the laws and court decisions of other states?
    12·1 answer
  • When people are aware of stereotypes about their social group as it relates to scores on intelligence tests?
    11·1 answer
  • Which of the following is not a disadvantage of using wind power?
    15·1 answer
  • Ice floats on water why?give short answer.​
    8·2 answers
  • A narrative's setting is
    5·1 answer
  • Which country's economy has struggled after many years of military dictatorship?
    14·2 answers
  • Suffering should be faced joyfully for the Christian because: I. Of the good results in our character. II. It helps us earn heav
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!