Acid rain is caused by a chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are released into the air. Hope this helps
A.
Active transport is the energy-requiring process of pumping molecules and ions across membranes "uphill" - against a concentration gradient.
The answer to the question is Oxyen
Answer:
9. False
- <u>opposite</u>
10. True
11. False
- <u>oxygen</u>
12. False
- <u>cellular</u><u> </u><u>respiration</u>