Answer:
Contamination of the control sample (negative control) with DNA
Explanation:
The Polymerase Chain Reaction (PCR) is a technique widely used in molecular biology laboratories to amplify a target DNA fragment using primer pairs and DNA polymerase. In PCR experiments, it is imperative to include both positive and negative controls. The positive control refers to the amplification of a PCR product (amplicon) of known molecular size during PCR reaction in order to ensure the correct molecular weight of the target DNA fragment. The negative control refers to the inclusion of a sample without DNA in order to ensure that no contamination with DNA has occurred in the other samples.
<span>C, Lizards and snakes are more alike since both species have a recent common ancestor. </span>
c. food production is the answer
<em>Look</em><em> </em><em>at</em><em> </em><em>the</em><em> </em><em>attached</em><em> </em><em>picture</em><em>⤴</em>
<em>Hope</em><em> </em><em>it</em><em> </em><em>will</em><em> </em><em>help</em><em> </em><em>u</em><em>.</em><em>.</em><em>.</em>
Answer:
A.
Explanation:
Definitely the goal of any athletes is to win a laurel, so that the energy put into timeless training can be consummated. Therefore the spirit of wining at all cost usually drive most athletes to spike up their systems to achieve their dreams. Most athletes are determined to win to satisfy the sponsor, family and relations. Besides coaches who want their work output to be noticed usually led athletes to spike the systems with steroid . Besides distractions by social levels, and need to meet up with time wasted ,made some athletes to spike systems.
Thus this collective efforts put pressure on the athletes to win at all cost.
