True or false: long-term use of marijuana can cause cancer and lung disease.
a.
true
b.
false
2.true or false: inhalant users do not build up tolerance to the drugs. a. true b. false 3.true or false: narcotics slow down breathing, sometimes so much that the brain does not receive enough oxygen.
a.
true
b.
false
4.true or false: drug use can cause illness, accidents, and even death.
a.
true
b.
false
5.true or false: drug users may break the law to get money to buy drugs.
a.
true
b.
false
p. s answer all

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