Water quality tests from a local river show low levels of a single heavy metal under the acceptable, legal limit. However, the residents of the town are showing signs of long-term kidney and liver damage. What can scientists infer about the possible reason for the illnesses in the town? - Heavy metals cause acute effects but not chronic effects.
- Heavy metals cause chronic effects but not acute effects.
- The heavy metal is bioaccumulating, causing chronic effects.
- The heavy metal is biomagnifying, causing acute effects.

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.'