I would say the nucleotides
Cytosine
Guanine
Adenine
Thymine
A:2 because atp molecules production has same explanations
Answer:
1. Circulatory System
2. White Blood Cells
3. Capillaries
4. Vein
5. Carbon Dioxide (CO²)
6. Circulatory System
7. Immune System , Fights
8. Red Blood Cells
9. Gas Exchange
10. Transport
11. Lungs
12. Artery, Heart and Lungs
13. Heart
14. Important Plant
15. Alveoli
anthropology.................................
False, Geothermal energy is heat from the Earth
