other facultyies do.thinks monsanta is right to be concerned about the public is acceptance of genetically vegetables. >> you have direct consumption. resistance, whether it's rite for not may be more important for those crops. >> they like to call the marker technology as one that turns a light on in a laboratory of plant breeding, so we can see what is going on in the plant need. >> "techknow" knot a look at monsanta's dna marker lad in woodland california. here, hundreds of markers have been discovered for traits in fruits and vegetables. the first step in the process - pulverizing tissue samples so d.n.a. can be extracted by the robot. how do you extract d.n.a.? how does that happen? >> thankfully biology made dna water soluble. all we need to do is add water. >> once that has happened it is deposited into a center final, removing plant debris. >> at 3,000 revolutions per minute, it's hard to get rid of the cellular debris from the leaf or chip. the second purification is to put the liquid through a f