How do the specific characteristics of carbon, hydrogen and oxygen enable the formation of larger complex molecules?

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.

List five ways we are indebted to phytoplankton

Several billion years ago which gas was the least prevailant in the atmosphere