In addition to secretions from the skin, latent prints may be composed partially or wholly of ___________________ .
a. amino acids
b. water
c. contaminants
d. all of the above
Question 2
Latent prints are constituted of materials which are either __________ or ____________ in water.
a. soluble, insoluble
b. visible or invisible
c. processed or not processed
d. patent or plastic
