Yes, it stunts its growth and could kill it. But 5-7 percent alcohol in water works fine for some bulbs (e.g. paperwhite narcissus and hippeastrum), reducing flower stems tallness without affecting leaves or flowers size.
Alcohol does not kill brain cells.
Yes, alcohol can effectively kill worms.
Alcohol does not kill pubic lice. They must be killed with insecticide.
Petroleum products such as diesel fuel, kerosene or gasoline will kill any plant, including flowers.
No
Yes, alcohol can effectively kill E. coli bacteria.
Yes, it can kill a plant within weeks. Do no try to water a plant with rubbing alcohol unless you expect to kill it.
Rubbing alcohol will kill just about anything it comes in contact with. Apply liberally.
Yes this is called Alcohol Poisoning
Alcohol of that strength is hygroscopic, it will kill you.
no! it will kill them