What is the first step in administering cardiopulmonary resuscitation (CPR)? Group of answer choices
Breathing for the victim
Clearing the airway
Massaging the shoulders
Chest compressions

How could you find out if that advice is based in scientific evidence?

The frequency in wich you perform certain exercise depends on the blank of the exercise

You isolate an infectious substance capable of causing disease in plants, but you do not know whether the infectious agent is a bacterium, virus, viroid, or prion. you have four methods at your disposal to analyze the substance and determine the nature of the infectious agent.i. treat the substance with enzymes that destroy all nucleic acids and then determine whether the substance is still infectious.ii. microscope.iii. culture the substance on nutritive medium, away from any plant cells.iv. treat the sample with proteases that digest all proteins and then determining whether the substance is still infectious.if you already know that the infectious agent was either bacterial or viral, which method(s) listed above would allow you to distinguish between these two possibilities? a) ib) iic) ii or iiid) iv