A girl currently runs 3 miles in 45 minutes. Her long-term goal is to run 3 miles in 30 minutes within one month. What would be an appropriate short-term goal for her first week of training?
A. to run 3 miles in less than 12 minutes
B. to run 3 miles in less than 15 minutes
C. to run 3 miles in less than 20 minutes
D. to run 3 miles in less than 40 minutes

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