Human effects on ecosystems Quiz
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5 questions, one answer each
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1. Which finding best shows a fish stock is overfished?
- A. Catch per unit effort has increased
- B. The average size of fish caught has risen
- C. Catch per unit effort has fallen
- D. More boats have been built
2. CITES Appendix I species are
- A. not threatened, with free trade
- B. protected only inside national parks
- C. listed to ban habitat destruction
- D. threatened with extinction, with commercial international trade banned
3. A data set shows carbon dioxide and temperature both rising. The correct conclusion is that
- A. human activity is proved to cause the rise
- B. there is a correlation, but more evidence is needed to prove cause
- C. there is no relationship
- D. temperature causes carbon dioxide to rise
4. The main purpose of peer review is to
- A. make papers cheaper
- B. give the authors more money
- C. check methods, data and conclusions before publication
- D. prevent anyone else repeating the work
5. Why does a quota help fish stocks recover?
- A. It limits the catch so enough breeding adults remain
- B. It increases the number of boats
- C. It reduces the mesh size
- D. It allows fishing in spawning grounds