Answer:
Polymerase chain reaction (PCR)
Explanation:
Polymerase chain reaction (PCR) is a method by which a target DNA fragment is amplified to produce millions of copies. In PCR, the Taq polymerase enzyme uses nucleotides and primers to replicate a small DNA segment <em>in vitro</em> and produces two DNA molecules. The newly formed DNA molecules are denatured by heating to facilitate their replication to produce four double-stranded DNA molecules. In this way, the number of DNA molecules is doubled in each cycle. Therefore, the small amount of DNA obtained from the minuscule spot of blood on a murder suspect’s shirt can be amplified using PCR.
Answer:
C. Isolated system
Explanation:
The question above is related to the the topic, "Thermodynamics."
Thermodynamics refers to how energy is being transferred among molecules. This study focuses on the "system" and the "surroundings/environment"
There are actually<u> three types of systems</u><em> (open, closed and isolated).</em> When it comes to "isolated system," such system doesn't interact with the surroundings. This means that, i<u>t is incapable of exchanging energy or matter with its environment.</u> This means that neither mass nor energy will be able to enter it; thus, it recycles all of the mass on its own.
Answer:
The results from this experiment conclude that all of the resulting bacteria contain the pUC18 plasmid without the human gene.
The method of genetic engineering might seem very easy but in actual it is a very difficult task and most of the time a person won;t get the expected results. The chances of a vector to actually take up a recombinant DNA are very less. Even after this, the chances of a recombinant plasmid to enter a bacterial cell by transformation are very few.
Which of the following adaptations to life on land is found in both insects and modern reptiles?
I'm not 100% sure, but I think the correct choice is tracheae to distribute oxygen (B).
Hope this helped :)