Where does diffusion occur in the excretory system, circulatory system, and digestive system?

Excretory: Kidney >> Nephrons (between tubules and capillaries)

Circulatory: capillaries (between tissues/cells and capillaries)

Digestive: small and large intestines (between lumen and capillaries)

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.'