Answer: DNA contains alternating sugar-phosphate molecules whereas RNA does not contain sugars
Explanation:
Answer:
exchange carbon dioxide for oxygen,help with the movement of the blood cells that pump oxygen-rich blood to all cells in the body.
Explanation:
Answer:
no we havent
Explanation:
The last one was 26,500 or 74,000 years ago.
Answer:
B
Explanation:
the quality of air will help identify any pollutants in the air.
