The reader can tell from the Article that __________.A.It can be difficult to stop invasive species from spreading.B.The golden mussel is the only threat to the Amazon River at this time.C.Researchers will give up on their efforts to stop the golden mussel.D.Ships from China are no longer allowed to travel to other countries.

Describe the golden mussel and how it has affected South America. What are scientists doing to try and stop the spread of this invasive species, and why?

Which statement from the Article best supports the idea that tiny golden mussels cause big problems?A.Water carried in ships could also contain mussel larvae.B.The golden mussel made its way from China by hitching rides on ships in the 1990s.C.The golden mussel only grows to 1 inch (2.5 centimeters) in length.D.They settle and develop, clogging pipes and forcing officials to spend millions of dollars each year to clear them out.SUBMITExtras

That invasive species can change the food web in an ecosystem by destroying or replacing native food sources is a direct threat. TrueFalse

18.Which of the following is the most serious threat to biodiversity?  A. Competition from exotic species  B. Commercial harvesting  C. Habitat destruction  D. Overexploitation

Suppose you were writing a summary of the Article. Which of these would not be important to put in the summary?A.The golden mussel has invaded five South American countries so far.B.Golden mussels have harmed native clam species and clogged pipes.C.Hugh MacIsaac is a college professor who studies invasive species.D.The spread of golden mussels can change the chemical makeup of water.SUBMITExtras