[OU.02] In 1957, the Russians launched the first successful orbiting satellite, called Sputnik. Which of these statements best explains why humans should continue to send orbiting satellites to space? They reflect hamful radiations in space.
They provide useful information about space.
They help change weather conditions on Earth.
They stop comets and asteroids from striking Earth.

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.'

answer///alimentary canal/gastrointestinal tract.digestive (gi);

the cell is the smallest structural and functional unit of living organisms, which can exist on its own. therefore, it is sometimes called the building block of life. some organisms, such as bacteria or yeast, are unicellular—consisting only of a single cell—while others, for instance, mammalians, are multicellular.