Give an example of how an invasive species can cause ecological or economic harm
What will be an ideal response?
Lacking predators, parasites, and/or competitors in their new environment, invasive species can proliferate and dominate a community. Impacts of invasive species have become more extensive in recent years because of the increased mobility of humans and globalization. An example of an invasive species is the zebra mussel. As adults, zebra mussels can attach to boats and ships (they were carried to the Great Lakes on ships). In their new environment, they did not encounter the predators, competitors, and parasites that limited their population growth in Asia and Europe. Their population grew, and they spread to other areas. They clog up water intake pipes at factories, power plants, and municipal water supplies and wastewater treatment facilities. They damage boat engines, degrade docks, foul fishing gear, and sink buoys. It is estimated that they cost the U.S. economy hundreds of millions of dollars a year.
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The minimum concentration factor necessary for profitable mining of an ore deposit depends on each of the following except
A. the metal's average concentration in a deposit. B. the mineral in which the metal of interest occurs. C. how the metal will be used once it is extracted from ore. D. the price of the metal being recovered.
The number of stars in the Milky Way galaxy is about
A) 25 million. B) 100 million. C) 100 billion. D) 25 trillion.
Historically, the unity of South Asia has been based on religious attributes
Indicate whether the statement is true or false
List and explain the five Pillars of Islam