Nina is spending the night at a friend's house and is having trouble sleeping. her friend offers nina one of her
parent's prescription sleep medications.
should nina take the prescription sleep medication from her friend?
(a)yes, prescription drugs are safe for anyone to take.
(b)no, prescription drugs should only be taken by the person for whom the prescription was written.
(c)yes, nina is tired and really needs to sleep.
(d)no, nina should look up information about the medication on the internet first to see if it is safe.

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