99 what is the operon in e. coli a classic example of? (answer wrong and get reported) 1. gene expression occurring at transcription 2. gene expression occurring by changing a protein shape 3. antibiotics blocking protein synthesis 4. gene expression leading to dna mutations

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.