The respiratory system is a collection of organs involved in carrying out gas exchange in your body. Deep in the lungs, tiny sacs called alveoli take in oxygen from the atmosphere and release carbon dioxide.
Answer:
1.both
2.DNa
3.RNA
4.Both
6.both
7.both
8.RNA only
9.DNA only
10.RNA only
11.DNA only
12.RNA only
13.Both
A
Explanation:
