Fluctuations in the phosphorus cycle in aquatic ecosystems . a. can lead to changes in the growth rates of aquatic populations b. are never caused by human impact on the environment c. lead to a decrease in the amount of phosphorus found in sediment d. never occur naturally

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.'

bacterium is not correct