How were scientists able to use rock on the ocean floor to determine that the earth’s magnetic field has changed direction?

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.

In what cells is the human genome located?

Which of the following is not associated with invasive species?