. >> "techknow" knot a look at monsanta's dna marker lad in woodland california.e, 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 filter, producing a d.n.a. that is a pure, high quality, so we can it. >> it is loaded into the wells. enzymes and other chemicals are added to detect the appearance of specific genes. >> the kneel is to found the one in 1,000 plants that contains in. >> the needle in a haystack. >> that's right. >> this shows the results on water melon plants. each dot is a plant. green dots indicate plants with a genetic marker for a certain disease resistanc

. >> our line for democrats, woodland hills, california. >> good morning. good morning and happy holidays. think theke to say i president is doing a fantastic job in light of what he stepped into. were on the verge of having no economy. he did not bring us into iraq. lost 4500, 5000 men. i don't know. people talk about boots on the ground. i do not really have the stomach for it. religious work, giving always other countries to help us, that is what we need to do. everyone has an interest. if the purse strings will be tied, he is taking the best measured response he can. and tired ofick hearing the republican party drone on. mcconnell said it from the get that they would obstruct everything this guy does and that is all they do. i am not sure if the purse strings will be tied fighting isis in afghanistan. that remains to be seen. >> about the president's legacy, what have previous presidents done in the last years to shore up press -- legacy? do they shore up the legacy with their party base? some might say he should work with congress and come up with a ne