In the gill of a fish, water and blood circulate ____, which ____ ...

[ashley]

In the gill of a fish, water and blood circulate ____, which ____ transfer efficiency.
 A) in the same direction; increases
  B) in opposite directions; increases
  C) in the same direction; decreases
  D) in opposite directions; decreases

Question 2

Which is not a reason why a refined oil spill is more harmful?
 A) The oil contains more energy potential due to additives during the refinement process.
  B) There are more biologically active components remaining in refined oil.
  C) The refining process removes heavier components.
  D) There are components that are added to oil which are deadly.

[dominiqueenicolee]

Answer to Question 1

B

Answer to Question 2

A

[ashley]

Excellent

[blakcmamba]

Gracias!