Explanation:
water light and carbon dioxide
“DNA” stands for: Deoxyribonucleic Acid
The researchers used different radioactive elements to label the DNA and proteins in viruses. This allowed them to identify which molecule the viruses inserted into bacteria. DNA was the molecule they identified. This confirmed that DNA is the genetic material.
The pyloric valve control food movement from the stomach into the small intestine.
the answer is epipelagic zone
