PCR (polymerase chain reaction) is a relatively new advance (1980's) but it has a great impact in our lives. Specifically, in forensic science, PCR is useful in many sorts of crimes . Up until the PCR method, in order to identify a person forensic scientists would use fingerprints or some other ambiguous methods like teeth marks etc. But now, with PCR, we can compare the genetic material found on a crime scene and compare it with a suspect's genetic material, definitively concluding whether they are the same person or not. The way this works is that we collect a sample from the crime scene with DNA and then PCR amplifies the quantity of DNA in that sample. One of the apparent advantages of this method is that PCR works with even a very small sample, often not even a single cell is required. This makes crime scenes full of information. Hence, succinctly, PCR has helped modern forensic science in that:
1) its results are more definitve than traditional identification methods and subject to less ambiguity
2) it is relatively fast
3) new pieces of evidence can be of value (like some hair cells) and identify the crominal in cases that in older times would be impossible to solve.
<span>There are so many societal issue that scientists will be able to address using the sequence of the human genome. For example, health epidemics. Using the genome, scientists can easily found how a pathogen affects a population and search for genes that can inhibit the pathogen. But no all health epidemics are caused by a pathogen. The obesity, nowadays a social health issue in so many countries, is an epidemic that can be address using the human genome. Also, the drug Abuse and Addiction. Scientific have found genes that are related to obesity and also genes related to drug addition. A person who have these genes is more likely to suffer those conditions. But, the discover of these genes and the disease relation help scientists to search for a better treatment.</span>
Answer:
The concept of showing emotions towards one in reaction to something said, generally a negative statement causes attitude.
Explanation:
Answer: D.) It allows water to resist freezing and thawing cycles.
The ability of the water molecule to absorb and retain heat is called as heat capacity of water, because of this property the temperature of water remains the same for long, irrespective of the external environment. It allows water to resist freezing and thawing cycles because water molecules will resist change in it's temperature. This temperature regulation will prevent instant heating and cooling, hence, will provide suitable environment for the survival of marine organisms.
