Select the correct answer. Athletes can decrease their chance of injury by stretching. When should they stretch?
A.
They should stretch before their warm up and before their main exercise.
B.
They should stretch before their warm up and after their main exercise.
C.
They should stretch after their warm up and before their main exercise.
D.
They should stretch after their warm up and after their main exercise.
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When exercising, you shouldn’t go past to avoid an injury.

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

2. which of the following is an incorrect statement? the idealrehabilitation program isa. never changed once written. b. based on the patient's age, injury, and other factors. c. monitored periodically to remain effective. d. re-evaluated if new injuries occur.