Aterm used for several different diseases/conditions of or problems with the heart muscle. there are many causes of these diseases. likewise, there are many different symptoms and treatments as well. it can affect males and females of all ages and ethnic backgrounds. in this disease, the muscle in the heart gets thick, stiff, thin, or filled with things the body makes but do not belong in the heart. when that happens, the heart has a reduced ability to pump blood, and that usually results in irregular heartbeats, of blood backing up into the lungs (or rest of the body), and/or heart failure. group of answer choices

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