The relative dating of layers of rocks is aided by more then a principle of stratigraphy. Nevertheless, there is one that may be considered the main basic principle utilised to aid on this task - the <span>Law of Superposition</span>, which indicates that, when in undisturbed strata, the oldest rock layer lays at the bottom, whereas the youngest rock layer lays at the top. All other layers that may exist in between follow this same pattern of old to young from bottom to top.
The answer is B. The membrane surrounding the nucleus. I'm an Honors student in bio. And this is really easy for me tooo.
Answer:
Polymerase Chain Reaction (PCR)
Explanation:
Polymerase chain reaction (PCR) is a technique that creates thousands of copies of a small amount of DNA. The processes use a small amount of DNA at the template, Taq polymerase as enzyme of DNA replication, primers, and deoxyribonucleotides.
By the end of one round of PCR, two copies of one DNA fragment is formed. These two copies enter the second round of PCR and form a total of four DNA segments. The process goes on and creates the desired number of copies from the single piece of DNA.