Nucleotides, which are the building blocks of nucleic acids, consist of a phosphate group, a nitrogenous base, and a

List charasteristics of athenosphere

For a comparative or experimental investigation, scientists often make a testable about a scientific question, and then they test it in the investigation. a.control b.hypothesis c.procedure d.system

Radiometric dating is used to tell the absolute age of materials by studying the decay rate of radioactive isotopes. the decay rates of isotopes are constant and are expressed as .