I believe that the subject is supposed to be science
Water is not found on the periodic table because it does not consist of a single element.
Answer:
True
Explanation:
Messelson and strahl explain the semiconservative existence of DNA replication by using CsCl gradient centrifugation. The hardest would go and rest at the base of the test tube, while the lightest would be at the top, the lightest would find a position between the heavy and the lightest. When the heavy tube is centralized, from a pool of light, bulky and moderate DNA.
This technique is called density-gradient centrifugation. Hence, the given statement is true.
When a nucleus emits a positron, its atomic number is lowered by one but its mass number stays the same.
