1. Which of the following species is not native to North America?
Common dandelion
Brook trout
Bison
None of the above

2. What is the most likely reason for the introduction of purple loosestrife?
For landscaping
For medicine
By accident
For making honey

3. What happened to the ancestor of the modern cow?
It was killed by hunters
It was selectively bred to extinction
It is still alive in India
It is the American buffalo

4. Why were mosquito fish spread outside of their native range?
For fish bait
To control mosquitoes
To provide food for game fish
For game fishing

5. Scientists first realized that purple loosestrife was an introduced species by:
Comparing leaf collections from North America and Eurasia
By noticing its rapid spread
By finding it only where ships docked
By noticing that it was avoided by North American wildlife

6. Which of the following human emotions are documented to lead to the introduction of exotic species?
Homesickness
Greed
Spite
Terror

7. What word did Charles Elton use in 1958 to describe the impact of invasions on native flora and fauna?
Contusion
Convulsion
Eruption
Evolution

8. Some introduced species become problems in their new-found homes. In what
way(s) do exotic species harm native species?
All of the below
Directly compete for food, water, and space
Alter ecosystem functions
Bring new diseases with them

9. Is the Jerusalem cricket really from Jerusalem?
Yes. It is indigenous to the Middle East.
No. It is from China.
No. It is native to the western U.S.
No. It is a South American species.

10. Which of the following insects is a U.S. native that switched hosts to feed on an introduced crop?
Colorado potato beetle
Colorado hairstreak butterfly
Beautiful tiger beetle
Gypsy moth