Benzodiazepine drugs include diazepam and alprazolam, are commonly prescribed for anxiety disorders because they work – as simple as that. Benzodiazepines relieves symptoms of anxiety, allowing the patient to rest or think more clearly. They are sometimes given before surgery so the patient will stay calm. Benzodiazepines exert effect in short period of time, and so works better than barbiturates. Such drugs should be used only for 1 to 2 weeks, or on as needed basis. Treating anxiety should be based on psychological approach rather than rely on drugs.
The invention of PCR make DNA fingerprinting possible because "PCR made it possible to produce enough copies for reliable tests".
<u>Option: C</u>
<u>Explanation:</u>
With the development of the PCR technique, DNA profiling has made enormous progress both in its distinguishing capacity and in its ability to survive information from very limited or damaged beginning samples. The PCR cycle mimics the biochemical mechanism of DNA replication yet restricts it to fragments of concern unique to DNA.
In the PCR method, the specimen of DNA is denatured by heating into separate polynucleotide strands. Two primers of DNA oligonucleotides are used for hybridization on opposite DNA strands to two matching nearby sites. Thus two new copies of the interest sequences are produced. Quantitative PCR methods allow accurate, high and automated calculations of the throughput.
Answer:
The correct answer is - natural selection.
Explanation:
Natural selection is a process of adapting according to the environmental change in order to survive and reproduce and increase their number. It is represented by Darwin for the first time. Natural selection leads to evolution.
In this case, White moths adapt according to the environment by increasing the population of black moths in order to blend with the surrounding and as the result, black moths are more likely to produce and survive and passed this trait to the next generation.
B - the food it obtains!
Hope that helps!
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