20 !

the following is an excerpt from the case study "it's all greek to me": "i am sorry to give you bad news. nikoleta does have anemia but, unfortunately, giving her a high iron formula was exactly the opposite of what should be done. nikoleta's disorder has a genetic basis." iron is an important structural component of hemoglobin. explain why this treatment failed and how the true cause of nikoleta's anemia was discovered.

there's no answer choices to go with this.

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