Week 13 Test Answers

The negative impacts of nonnative species generally outweigh the positive impacts.

Which of the following is true concerning hull fouling from commercial shipping and recreational boating?a.It constitutes less than half of all nonnative species introductions.b.The revenue brought in from these industries is relatively small.c.It is difficult to prevent since ship hulls begin, conduct, and end voyages in water.d.It is best combated by chemical treatments.

How has human use of salt marshes changed over time?a.Humans have come to value salt marshes and now seek to preserve and restore them.b.Humans now use drained salt marshes exclusively for agriculture.c.Humans have begun to use salt marshes for landfills.d.Humans have begun to use marsh land for housing and commercial development.

Which of the following does not explain the importance of mangrove forests?a.They provide shelter to organisms on high energy coasts.b.They help prevent erosion along coasts.c.They increase surface runoff and flooding.d.They filter and process pollutants out of the environment.

Seafood Watch is a program that identifies sustainably harvested, ocean friendly seafood in order to _______.a.gather evidence of fishermen violating international lawb.allow consumers to make environmentally responsible choicesc.increase the price fishermen receive for their catchesd.increase the sale and consumption of seafood

Landlocked nations do not contribute to marine debris.

The principle difference between where salt marshes and mangrove forests grow is the salinity of the water.

Why might it be beneficial to regulate what species of plants and animals people are allowed to own in particular environments?a.Some species might become invasive and destructive if they escaped.b.Some species may be dangerous to humans.c.Nonnative plants and animals should only be used for commercial purposes.d.There is no reason to restrict an individuals’ right to own plants or animals.

Which of the following best explains the current state of the majority of the world’s fisheries?a.they are being sustainably harvestedb.they are currently overfishedc.they are currently underfishedd.they are already depleted

Which relatively flat feature of the ocean floor is in the open ocean and borders the continental shelf?

Seafood Watch recommends which seafood _______.a.to buy or avoidb.to catch and sellc.to harvest sustainablyd.is safe to eat

wave energy

Study this map.

most likely