Prescriptive Test — Unit test Answers

Which of the following is not an example of mechanical control of nonnative species?

Invasive species often unbalance the ecosystems into which they are introduced because _______.

Which of the following is not a way that nonnative organisms are introduced to new aquatic ecosystems related to commerce?

All of the following are true of the Zebra mussels found in the Great Lakes EXCEPT:

Which of the following is true concerning hull fouling from commercial shipping and recreational boating?

Which of the following is not true concerning the zebra mussel in the United States?

Nonnative species disrupt the natural variability of an ecosystem.

The rusty crayfish is harmful to native species of crayfish because it clear cuts the bottom of waterways leaving native species without a food supply.

Hull fouling is a(n) _______ introduction of nonnative species.

Cane toads are highly successful as an invasive species in Australia because there is only one species that is believed to be able to prey on them.

Ships that use ballast water are not in danger of introducing invasive species into aquatic habitats.

Which of the following is an example of mechanical control of nonnative species?

Why might it be beneficial to regulate what species of plants and animals people are allowed to own in particular environments?

Why does the aquarium trade contribute to the introduction of nonnative species?

Introducing invasive species to an ecosystem results in an increase in biodiversity.

Nonnative species are only introduced unintentionally.

All nonnative species in an ecosystem are considered invasive species.

Why are cane toads in Australia considered an invasive species rather than simply nonnative?

Why has the spread of the herbicide-resistant hydrilla through Florida’s waterways resulted in them no longer being navigable by most boats?

Which of the following is not true about nonnative species?