Marine invasive species like this tropical seaweed 1.may expand ...

[Mr.Thesaxman]

Marine invasive species like this tropical seaweed
  1.may expand their range if global warming continues.
  2.will be eaten by native species very soon after the invasion.
  3.must reproduce even more successfully in their new habitat.
  4.once introduced cannot be stopped.
 
Question 2

The areas shown that suffer from oxygen depletion are victims of
  1.iron pollution that forms rust with the oxygen.
  2.higher than average rates of primary production.
  3.lower than average rates of primary production.
  4.reduced wave action.
 

[miss_1456@hotmail.com]

Answer to Question 1

1

Answer to Question 2

2