PLS HELP ASAP What causes a tornado to form? Water vapor condenses, giving off energy. Wind over ocean water forces water vapor upward. A warm, moist air mass collides with a cold, dry air mass. Air pressure changes suddenly, causing rapid air movement.

A change in wind direction cause the air to spiral. Then, warm humid air rises up in the inside of the tornado while cold dry air goes down. These things cause the spinning air currents inside the tornado.

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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.'