Which two observations are most useful for explaining the trends in the data? Select two answer choices.
A. Photosynthesis and cellular respiration have opposite effects on carbon dioxide levels.
B. Carbon is stored in solid form in shells, rocks, and sediments.
C. Atmospheric carbon dioxide may dissolve in ocean water.
D. The burning of fossil fuels adds carbon dioxide to the atmosphere.
E. Activities that produce or take up carbon dioxide vary with the seasons.

E,D

Fossil fuels are used in cars that make smoke

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.'