Which of the following statements is true?

a.) galaxies contain few stars and a lot of dust

b.) galaxies contain dust, planets, and billions pf stars

c.) galaxies contain thousands of planets and few hundred stars

d.) galaxies contain mostly gas and dust with 1 or 2 stars

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.'