Answer:
That's what I had so far. 2) a. Lungs b. Closed
3) CO2 / Oxygen
The answer to this question is D. because it needs a combination of both types of economies
Answer:
<em>I assumed this question was a fill in the blank. :-)</em>
- Hypertonic
- Greater
To part A the answer is continental drift :D to Part B the answer is Mid-ocean ridges :D Hope I was helpful