Ablood specimen is suspected to contain a photolabile drug. what step should toxicologists take as a precautionary measure?
a.
store the specimen in amber colored vials.
b.
add sodium citrate to the specimen.
c.
add potassium oxalate to the specimen.
d.
add heparin to the specimen.

class- forensic science

Johnny rode his bike to a friend's house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was not able to play. what was his displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point