What is the source and sink for xylem and phloem?

What is a group of organisms that are closely related and share similar characteristics

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.

The law of thermodynamics states that energy can't be created or destroyed. to natural sources of energy on earth are the