What is the result of American dependence on foreign energy sources? A)
loss of jobs
B)
increased consumer prices
C)
national security threats
D)
a and b only
E)
all of the above

How much oil consumed by the United States comes from foreign countries? In 2019, U.S. net imports (imports minus exports) of petroleum from foreign countries averaged about 0.67 million barrels per day, equal to about 3.3% of average daily U.S. petroleum consumption.

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.'