Yes.
DNA or Drugs
yes
Yes it can. The hair follicle has nothing to do with it. The test involves DNA.
Hair can be used for a DNA profile.
is there anything that can be used to help pass a DNA test
yes you can but in order to do a hair test for paternity, you need to have hair that still has the roots and follicles still attached. This means, taking strands from a brush will not work, you need to pull the hair from your head and look to make sure the hair follicles and roots come attached to the sample. In most cases of a paternity test, three to four strands of hair require submitting in order to do the DNA testing.
No, she had a hair cut and instead of leaving the hair on the floor security took it away in case someone tried to use it for a DNA test, there is no DNA happening but they are aware that someone might have taken it for that purpose.
A hair test, won't say when you've used, only if you have used.
there are different ways to do the test like blood sample or hair sample
No, hair is not interchangeably used to describe DNA. However, hair is a source for DNA this is why when forensic scientists are involved in crime scenes, they look for any sample of which contains DNA, including hair.
It will show up on a hair test, but it shouldn't show up on a blood or urine test. drugs will show up on a hair test for possibly years.
Blood tests can test for DNA. DNA tests can be used to make sure that the baby's DNA matches the parents' DNA.