The purines always pair with the pyrimidines
Answer:
four blood types, a, b, ab , and o,
Both the temperature and the pressure increase.
D. He has an aerator that pumps bubbles into the tank
Answer:
Dead zones are hypoxic (low-oxygen) areas in the world's oceans and large lakes, caused by "excessive nutrient pollution from human activities coupled with other factors that deplete the oxygen required to support most marine life in bottom and near-bottom water. (NOAA)".
Explanation:
