1.
what is a good strategy for avoiding tobacco use?

don’t use refusal skills because it will make you seem vulnerable and encourage further peer pressure.

hang out with people who use tobacco so you can observe the negative short-term effects on them.

surround yourself with positive influences.

go to places where tobacco is used heavily so you will be disgusted by the smell of smoke.
2.
carbon monoxide is a thick, sticky, dark fluid produced when tobacco burns.

true

false
3.
which of the following is an ingredient found in cigarettes?

nicotine

hydrogen cyanide (found in rat poison)

ammonia

all of these

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