If you live on a river delta or coastline, you may not be able to eat the local shellfish because of high levels of toxins present in the water. why? the toxins contained in the shellfish can't be broken down by your stomach. shellfish regularly consume poisonous red tide organisms. clams seasonally produce toxic substances. most harmless native clams have been replaced by bad species. clams filter-feed and concentrate the dilute pollutants from the water, thus acting as early warning indicators of severe pollution.

Clams filter-feed and concentrate the dilute pollutants from the water, thus acting as early warning indicators of severe pollution.

Clams are prone to be polluted in the outlets along the seashore or near-shore coastal waters rather than the open ocean. They are efficient biological indicators of pollution by successfully filtering pollutants. It serves a water-based pollutant spotter as it absorbs the pollutants in its tissues.

i would say the prokaryotic cells the prokaryotic cells are less complex, are usually found only in unicellular organisms and have more limited capabilities than eukaryotic cells.

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.'