What happens if you place human red blood cells in a concentrated salt solution?
they shrink as water moves from inside to outside the cells as a result of osmosis.
they burst as water moves from outside to inside the cells as a result of osmosis.
no change occurs as water freely diffuses back and forth across the cell membranes.
the cells expend energy pumping water out in response to the greater external salt concentration.

since there are no options posted i'll give you a few examples.

a dolphin's flipper, bird's wing, cat's leg.

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.'