I think the answer is Eliminates waste
Answer:
4. A
4.(part 2) B
6. C
7. A
8. C
9. A
10. B
11. C
12. D
13. C
14. D
15. C
16. C
17. A
18. C
19. B
20. G
I Really hope this was helpful to you i tried my best to answer all the questions
Explanation:
The alveoli. These little air sacs are found on the end of the bronchioles and are the place where oxygen enters the blood and the carbon dioxide leaves.
The nitrogen cycle could no exist without bactria. bacteria that lived inside the ground, catch the nitrogen that has been fixed and covert it into nitrate.
