If the atmospheric carbon concentration was 280 parts per million in 1750, what was the concentration in 2012?

The correct answer is "400 parts per million".

Explanation:

According to Jessica Blunden's article "2013 State of the Climate: Carbon dioxide tops 400 ppm", over the past decade the average rate of CO2 concentration in the atmosphere has triplet. This caused that by 2012, a new threshold has reached and the World Resources Institute reported a CO2 concentration of 400 ppm. Unfortunately by 2013, the CO2 concentration increased, and was 2.8 ppm higher than in 2012.

ans.

dna fingerprinting is defined as a process that determines the dna characteristics of an individual. these dna characteristics are unique among individuals as their fingerprints, so it is known as dna fingerprinting.

steps of dna fingerprinting includes extraction of dna from sample, amplification of dna, restriction digestion of amplified dna, and then analysis of dna by gel electrophoresis, respectively.

thus, the next step performed by the scientist is 'to cut the amplified dna (obtained by polymerase chain reaction) by restriction enzymes that cleave the dna into fragments and their analysis.'