What is the meaning of H20

The similarities of organisms in which two areas numbered above provide the best evidence for common ancestry between organisms in both locations?

The first amino acid of a new polypeptide chain is

Cpr, or cardiopulmonary resuscitation, is a first-aid technique to save lives. it involves compressions of the patient's chest cavity. which description is the best description of the functions of chest compressions in cpr? chest compressions are done to pump the heart. chest compressions are done to strengthen the rib bones. chest compressions increase carbon dioxide inhalation. chest compressions allow the patient's muscles to wake up.