What state is a person in when his or her heart stops beating?
a. cardiac arrest
b. heart attack
c. reperfusion
d. stroke

Last 5 benefits of physical activity and identify each benefit as either a physical mental and emotional or social benefit

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

Waste is deposited into in thin layers which are then compacted and covered with soil.