There is a medical expert on television discussing the lasted advances implantable cardiovascular-defibrillator. what is this device use for. To remove an embolism to treat life threatening heart rhythms to mechanically widen a clogged artery to reduce heart blood pressure to normal levels Answer “to treat life threatening heart rhythms”

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.

True or false. repeated drug use may lead to drug tolerance which occurs when a user requires larger amounts of the drug to achieve the desired effect.